Bill is walking to the store and he walks the first 500m in 60s. He then runs 1000m in 90s. After stopping for 45s, he was the remaining 450m to the store in 50s. What is the average velocity for Bills entire
trip?

Bill Is Walking To The Store And He Walks The First 500m In 60s. He Then Runs 1000m In 90s. After Stopping

Answers

Answer 1

Answer:

letra A segundo o couculo a divisão e completa


Related Questions

___ was a pioneer in research on reflex behavior showing that reflexes could occur in the absence of brain involvement?
-Gall
-Galvani
-Hall
-Flourens
-Broca

Answers

G. Stanley Hall was a pioneer in research on reflex behavior showing that reflexes could occur in the absence of brain involvement.

What exactly is a reflex?

The essence of Descartes' description has been captured in modern definitions of reflexes: an action or movement of the body that occurs automatically, or without thinking, as a reaction to something.

21 These definitions have three main components: a stimulus, subconscious processing, and a reaction.

What distinguishes the reflex?

One possible way to distinguish reflexive from conscious behaviors is to determine whether the stimulus for the behavior is external (e.g., a hammer tap or the shine of a light) or internal (e.g., hunger or love). This distinction appeals to our intuitive understanding that reflexes are typically subconscious responses to external stimuli. This proposal, however, has a number of flaws.

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Could you please help me with this?? I literally failed my quiz 3 times

Answers

The answer is D :)))))))

A drag racing car accelerates from rest for 4.0s, boosting the car to a top speed of 130 m/s. At this instant, the engines shut off and a parachute is deployed, causing it to slow down at a rate of 2.5 m/s^2 until it stops.

a) How far does the car travel from when it starts until the parachute is deployed?
b) What is the total distance traveled by the car from its starting point to when it comes to a complete stop?

Answers

The distance that the racing car traveled from  when it starts until the parachute is deployed is 20 m.  The total distance traveled by the car from its starting point to when it comes to a complete stop is 520 m.

What is  acceleration ?

The acceleration of a moving body is the rate of change in its velocity. It is a vector quantity having magnitude and direction. Thus, a change in magnitude or direction or both of them will cause an acceleration of the body.

Given that, speed v = 36 m/s

time =  4 s

Then the distance travelled from starting = 36. m/s × 4 s

then s = ut + 1/2 at²

initial velocity u = 0

a = 2.5 m/s²

s = 1/2  2.5 m/s²× 16 s² = 20 m

 

Therefor, the distance traveled by the car until the parachute is deployed is 20 m .

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Three 200-N forces are exerted on the beam shown in the figure (Figure 1).
Determine the torque about the axis of rotation on the left produced by force F? 1onB.
Determine the torque about the axis of rotation on the left produced by force F? 2onB.
At what distance from the axis of rotation must F? 3onB be exerted to cause a torque that balances those produced by F? 1onB and F? 2onB?

Answers

The torque about the axis of rotation on the left produced by force F1onB is 600 Nm and the torque about the axis of rotation on the left produced by force F2onB is also 600 Nm. Force F3onB must be exerted at a distance of 0.5 m from the axis of rotation to balance the torques produced by F1onB and F2onB.

F1onB Torque: 600 Nm

F2onB Torque: 600 Nm

F3onB Distance: 0.5 m

1. To determine the torque about the axis of rotation on the left produced by force F1onB, we need to calculate the moment arm. The moment arm is the perpendicular distance from the axis of rotation to the line of action of the force. The moment arm for F1onB is 0.5 m, so the torque produced by F1onB is 600 Nm (F1onB x Moment Arm).

2. To determine the torque about the axis of rotation on the left produced by force F2onB, we need to calculate the moment arm. The moment arm for F2onB is 0.5 m, so the torque produced by F2onB is also 600 Nm (F2onB x Moment Arm).

3. To determine the distance from the axis of rotation at which F3onB must be exerted to balance the torques produced by F1onB and F2onB, we need to use the equation Torque = Force x Moment Arm. Since the total torque must equal 0, we can set up the following equation: 600 Nm + 600 Nm + (F3onB x Moment Arm) = 0. Solving for the Moment Arm, we get Moment Arm = -0.5 m, which is the distance from the axis of rotation at which F3onB must be exerted to balance the torques produced by F1onB and F2onB.

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Which of the following would change the period of oscillation of this torsion pendulum? a. increasing the mass
b. decreasing the initial angular displacement c. replacing the disk with sphere of equal mass and radius d. hanging the pendulum in an elevator accelerating downward Subomit

Answers

Option A and Option C are correct .

What is pendulum ?

Pendulum is an object suspended from a fixed point that can swing back and forth under the influence of gravity. A pendulum is used to regulate the movement of a clock because the time interval between each complete swing, called the period, is constant. The formula for the pendulum period T is the 2π square root of T = √L/g.

The Italian scientist Galileo (circa 1583) first noticed the invariance of the pendulum's period by comparing the motion of a swinging lamp in the Cathedral of Pisa with its pulse rate.

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what does peter alward identify as that which the practice of philosophy consists?

Answers

Peter Alward identifies reasoning as that which the practice of philosophy consists.

Who is Peter Alward?

Peter Wallace Brannen Alward is a Canadian philosopher. He is an academic by honour, known to be a Professor in Philosophy and the Department Head in Philosophy at the University of Saskatchewan. He is popular for his publications on philosophy of fiction, philosophy of art and environmental philosophy.

Key to Alward's argument is a notion known as the "narrative informant" who relates the reader's encounter with fictional events through - sometimes unreliable - reporting. Alward portrays the confusion about fiction ideas from a failure to properly relate between writing fiction and telling stories, while creating a concept whereby the writer is a sculptor who constructs works of fiction out of words.

Therefore, the correct answer is as given above

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What is a quantum number?

a) the number representing a discrete orbit or energy level
b) number of whole electron wavelengths absorbed by an object
c) the number of whole electron orbits in an electron wavelength
d) number of whole electron wavelengths removed from a continuous spectrum when it passes through a substance

Answers

A number that designates a specific orbit or energy level.

What are examples of energy level?

How Do Energy Levels Work? Energy levels are the fixed locations outside of an atom's nucleus where electrons may be located (also known as electron shells). The tiny, negatively charged electrons encircle the smaller, positively charged nucleus in an atom. Energy levels mirror a ladder's rungs in a number of ways.

What level of energy does an atom have?

Energy levels are nothing more than the electrons' set distances from an atom's nucleus. The electron shell is another name for the energy levels. An electron can migrate across energy levels, but it cannot remain in one energy level while in another.

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The ball is ejected horizontally from the tube with a speed of 8m/s Find on of the path, y=f(x) and then find the ball's velocity and the angential components of acceleration when t=025 s

Answers

The path of the ball can be represented by the equation y(x) = (1/2)(-9.8)[tex](x/8)^2[/tex] + [tex]y_{0}[/tex], where [tex]y_{0}[/tex] is the initial vertical position of the ball. This equation describes a parabolic trajectory, the horizontal component of velocity is constant, so the equation for the horizontal position of the ball is x(t) = x0 + [tex]v_{x0}[/tex]*t, where [tex]x_{0}[/tex] is the initial position and [tex]v_{x0}[/tex] = 8 m/s.

The vertical position of the ball is given by y(t) = [tex]y_{0}[/tex] + [tex]v_{y0}[/tex]*t + (1/2)[tex]at^2[/tex], where [tex]y_{0}[/tex] is the initial position, [tex]v_{y0}[/tex] = 0 m/s, and a = -9.8 [tex]m/s^2[/tex] (the acceleration due to gravity).

At t = 0.25 s, the velocity of the ball is ([tex]v_{x0}[/tex], [tex]v_{y0}[/tex] + at) = (8 m/s, -2.45 m/s). The angular components of acceleration are (0 [tex]m/s^2[/tex], -9.8[tex]m/s^2[/tex]).

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how far from the dog will the suitcase land? you can ignore air resistance.

Answers

The initial vertical velocity of the suitcase will be the same as the vertical velocity of the airplane at the time it was dropped. As a result, the suitcase will land 795 meters away from the dog.

What does Velocity mean?

Velocity is a measure of the rate at which an object's position changes over time. It is a vector quantity, which means it has a magnitude as well as a direction. Velocity is the product of speed and direction.

What does  Vertica Velocity mean?

Vertica Velocity is a cloud-based analytics platform that enables users to quickly and easily analyze, visualize, and share their data. It allows users to easily build and deploy data-driven applications that can be used to make better decisions in real-time. It provides a wide range of features, such as interactive dashboards, drag-and-drop visualizations, and advanced analytics. With Vertica Velocity, users can quickly and easily access the insights they need to make better decisions.

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Determine distance between two charges Q1=500nC and Q2=- uC which interact with each force 670mN. The charges are immersion in the medium with relative permittivity Er=2 E0=8.85

Answers

The distance between the two charged particles is 8.2 cm.

What is the distance between the two charges?

The distance between the two charges is calculated by applying Coulomb's law of electrostatic force as shown below.

Mathematically, the formula for the force of attraction or repulsion between two charged particles is given as;

F = ( kq₁q₂ ) / ( r² )

where;

k is the coulomb's constantq₁ is the charge of the first particleq₂ is the charge of the second particler is the distance between the charges

r² = ( kq₁q₂ ) / ( F )

r = √ [ ( kq₁q₂ ) / ( F ) ]

The distance between the two charged particles is calculated as;

r = √ [ (  9 x 10⁹ x 500 x 10⁻⁹ x 1 x 10⁻⁶ ) / ( 670 x 10⁻³ ) ]

r = 0.082 m

r = 8.2 cm

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Suppose the distance from the lens system of the eye (cornea +lens) to the retina is 17 mm.
(a) What must the power of the lens be whenlooking at distant objects?
(b) What must the power of the lens be when looking at an object20.0 cm from the eye?

Answers

a) Power of lens is 0.058D

Focal length =17mm

Power=1/focal length

Power=1/17

Power=0.058D

b) Power of the lens when looking at an object 20.0 cm from the eye is 0.05D

Focal length =20cm

Power=1/focal length

Power=1/20

Power=0.05D

What is the power of the lens?

The power of a lens is defined as the reciprocal of its focal length. It is represented by the letter P. The power P of a lens of focal length f (in m) is given by. P=1f. The SI unit of power of a lens is 'dioptre'.

How do you calculate eye lens power?

The power of a lens is defined as the reciprocal of its focal length in meters, or D = 1/f, where D is the power in diopters and f is the focal length in meters.

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A cube of brass has a shear force of 1650 N acting
on it as shown in the figure below (Figure 1). This
causes the cube to deform through an angle of 0.06
Part A
What is the length of one of the cube's sides?
Enter your answer in millimeters.

Answers

The length of one of the cube's sides is 3.97 mm.

What is the area of the cube?

The area of the cube is calculated by applying the following formula as shown below.

Young's modulus is equal to ratio of shear stress to shear strain.

E = Shear stress / Shear strain

Shear stress = F / A

where;

F is the applied forceA is the area of the cubeE is Young's modulus

Shear strain = e / L

Shear strain =  tanθ

E = Shear stress / ( tanθ )

E = ( F/Atanθ )  

A = ( F / Etanθ )

Young's modulus of brass = 1 x 10¹¹ Pa

A = ( 1650 / 1 x 10¹¹  x   tan(0.06)

A = 1.576 x 10⁻⁵ m²

The length of a side of the cube is calculated as follows;

L² = A

L = √ A

L = √ (1.576 x 10⁻⁵ )

L = 3.97 x 10⁻³ m

L = 3.97 mm

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nervous tissue is made up of newrogila and what other type of cell

Answers

The nervous tissue consists of two types of cells one is known as glial cells while the other is known as neurons.

The nervous tissue comprises neuroglia and what other type of cell?

The nervous system is very complex. We know that there are only two types of cells in the nerve tissue. The actual nerve cell is known as a neuron. The neuron is the conducting cell that can transmit impulses and the structural units of the nervous system. There are other types of cells is well which are known as the neuroglia, or glial, cells.

Basically, the nervous tissues consist of two cells one is called nerve cells while the other is called glial cells which help to transmit nerve impulses and also provide nutrients to neurons.

So we can conclude that the nervous tissue is made up of two types of cells, neurons, and glial cells.

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A 75kg passenger is riding the cliffhanger barrel ride at the fair. If the barrel radius is 4m and the coefficient of friction between the rider and the wall is 0.5, what is normal force the rider experiences and the minimum speed the ride can turn so that the rider doesn't slide down the wall?

Normal force = ___ N

Min speed = ____ m/s (round to the nearest tenth)

Answers

Answer: The normal force the rider experiences is the sum of the gravitational force acting on the rider and the friction force acting between the rider and the wall of the barrel.

Normal force = gravitational force + friction force

The gravitational force acting on the rider can be calculated using the weight of the rider, which is the mass of the rider multiplied by the acceleration due to gravity:

Weight = mass * acceleration due to gravity

Weight = 75 kg * 9.8 m/s^2 = 735 N

The friction force acting between the rider and the wall of the barrel can be calculated using the coefficient of friction and the normal force:

Friction force = coefficient of friction * normal force

Solving for the normal force, we get:

Normal force = Weight / (1-coefficient of friction) = 735 N / (1-0.5) = 1470 N

To find the minimum speed the ride can turn so that the rider doesn't slide down the wall, we can use the formula

velocity = square root of ( (Normal force * radius ) / (mass))

Minimum speed = √(1470 N * 4 m / 75 kg) = 14.5 m/s (round to the nearest tenth)

An object's speed is increased by a factor of three. > 50% Part (a) How does the object's momentum change?
a. There is not enough information. b. It decreases by a factor of three
c. The momentum does not change. d. It increases by a factor of more than three e. It decreases by a factor of more than three f. It increases by a factor of three.

Answers

kinetic energy increases by a factor of 9 is the correct answer .

What is momentum ?

Momentum, the product of a particle's mass and its velocity. Momentum is a vector quantity. It has both magnitude and direction. Isaac Newton's second law of motion states that the rate of change of momentum over time is equal to the force acting on a particle. See Newton's Laws of Motion. From Newton's second law,  if a particle is subject to a constant force over a period of time, the product of that force and the time interval (momentum) equals the change in momentum. Conversely, the momentum of a particle is a measure of the time it takes for a constant force to come to rest.

When speed is increased by a factor of three,

New speed v'= 3v    where v is the initial speed

a) Momentum P= mv

So new momentum P'= mv'= m*3v= 3 mv= 3P

So momentum increases by a factor of three

b) Kinetic Energy KE=m(v^2)/2

New Kinetic Energy KE'= m(v'^2)/2= m((3v)^2)/2= 9 m(v^2)/2= 9 KE

Therefore kinetic energy increases by a factor of 9

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Find the total positive charge of all the protons in 1.0mol of water.

Answers

The total positive charge of all the protons in 1.0mol of water is  6.022x10²⁴

What is a proton made of?

Two up protons and the one down quark are found in protons. One up particle and two downwards quarks make up neutrons. The "strong nuclear force," one of the four basic forces, holds the nucleus together (gravity and electromagnetism are two others).The number many protons within an atom is crucial since it determines the atom's identity. A hydrogen atom will be recognized as having just one proton, a carbon atom as having six protons, and so on. An atom's elemental composition is determined by the number or protons in it.

Hence, each molecule has 10 protons.

We have 6.022 x 10²³ molecules in one mole of water,

therefore,

multiply this by 10 to get the amount of protons:

Protons in a mole of water: 6.022x10²⁴.

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A 10,000 kg shipping container is on a truck moving at 75 mph on a flat road. The driver brings the container to a stop with an average force of 2500 N exerted on the container. Calculate the stopping distance.

Answers

When Shipping container is on a truck moving on a flat road then stopping distance is 180 meters.

Given,

mass m = 10000kg

speed v= 75mph

Average force F=2500N

When a car skids to a stop, the work done by friction upon the car is equal to the change in kinetic energy of the car. Work is directly proportional to the displacement of the car (skidding distance) and the kinetic energy is directly related to the square of the speed (KE=0.5*m*v2).

For this reason, the skidding distance is directly proportional to the square of the speed. So if the speed is tripled from 75 km/hr to 120 km/hr, then the stopping distance is increased by a factor of 9 (from 20 m to 9*20 m; or 180 m).

When analyzing forces in a structure or machine, it is conventional to classify forces as external forces.  Constraint forces or internal forces.External forces arise from interaction between the system of interest and its surroundings.

Examples of external forces include gravitational forces; lift or drag forces arising from wind loading, electrostatic and electromagnetic forces; and buoyancy forces; among others.

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A photon with energy 2.76 eV is absorbed by a hydrogen atom.
(a) Find the minimum "n" value for a hydrogen atom that can be ionized by such a photon.
(b) Find the speed of the electron released from the state in part (a) when it is far from the nucleus.
km/s

Answers

n=3 . is the correct answer .

What is Energy ?

Energy, in physics the ability to do work. It can exist in electrical, kinetic, thermal, electrical, chemical, nuclear, or various other forms. There is also heat and work. H. After transmission, energy is always referred to according to its nature. Thus, the heat transferred can become thermal energy, while the work done can appear as mechanical energy. All forms of energy are associated with movement. For example, any object has kinetic energy when it is in motion. A taut device such as a bow or spring can create motion even when stationary. Because of its composition, it contains potential energy. Similarly, nuclear energy is potential energy as it results from the composition of subatomic particles within the nucleus .

a)

The energy of a hydrogen atom in nth level is given by

En=-13.6/n2

=>2.76 =13.6/n2

n=sqrt[4.9275]=2.22

n=3 (approx)

b)

For n=3

E=-13.6/32 =-1.51 eV

Kinetic energy of freed electron is

K=2.76-1.51 =1.25 eV

=>(1/2)mV2 =1.25 eV

1/2)(9.11*10-31)V2=1.25*(1.6*10-19)

V=6.6263*105 m/s

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What is the magnetic flux through the loop shown in the figure below if a = 30 cm? Assume the area vector A is pointed into the page.

Answers

The magnetic flux across the loop in the figure below, with a = 30 cm, is -30bB. How many magnetic lines of force are present in a specific area is determined by the magnetic flux.

For instance, the magnetic flux density is lower if fewer magnetic lines cover a large region of cross section. Knowing the magnetic flux also enables us to make an educated guess about the magnitude of the magnetic field in a particular area. The magnetic flux through a surface in electromagnetism, a branch of physics, is the surface integral of the normal component of the magnetic field (B) travelling through that surface. represented by A or B.

= ABcos(theta), = baBcos(theta), and = -30bB

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A number of wires carry currents into or out of the page as indicated in the figure. (a) Using loop 1 for Ampère's law, what is the net current through the interior of the loop? (b) Repeat for loop 2

Answers

The net current through the interior of the loop is 9 I into the screen.

And for loop two is 8 I out of the screen.

As per the given data, several wires carry currents into or out of the page.

Here we have to determine the net current through the interior of the loop.

For loop 1, the inward currents are 10 I and 14 I. The outward current is 15 I, so, the net current through loop 1 is,

I net = 10 I + 14 I - 15 I

= 9 I into the screen.

The net current through the interior of the loop is 9 I.

For loop 2, the inward current is 7 I, and the outward current is 15 I, so, the net current through loop 2 is,

I net = 15 I - 7 I

= 8 I Out of the screen.

Therefore the answer is 8 I.

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The normal boiling point of diethyl ether is 34.6°C. At a pressure of 1.3 atm, the boiling point is: A) > 34.6°C B) <34.6 °C C) 34.6°C D) none of the above

Answers

The answer is A) > 34.6°C

The normal boiling point of a substance is the temperature at which it changes phase from liquid to gas at a pressure of 1 atm. At a pressure of 1.3 atm, the boiling point of a substance will be different.

The boiling point of a substance increases with an increase in pressure, so at 1.3 atm, the boiling point of diethyl ether will be greater than 34.6°C.

Therefore, the answer is A) > 34.6°C

It's worth noting that the boiling point elevation equation can be used to calculate the boiling point at different pressures, but it requires the knowledge of the substance's molar heat of vaporization.

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A spring with a cart at its end vibrates at frequency 6.0 \mathrm{Hz}6.0Hz.(a) Determine the period of vibration. (b) Determine the frequency if the cart’s mass is doubled while the spring constant remains unchanged and (c) the frequency if the spring constant doubles while the cart’s mass remains the same.

Answers

The time period T=0.167 and if the mass is doubled the modified frequency will be f'= 4.242Hz.

The time for one complete vibration is called the period (T) and is measured in seconds. If the period is large the frequency is low, and If the period is small the frequency is high.

The time period is inversely proportional to a frequency which is calculated as:

T=1/f

Given f=6.0Hz substitute in the formula

T=1/6

Time period(T)=0.167

Let, k be the spring constant and m be the mass of the cart then,

[tex]f=\frac{1}{2\pi} \sqrt{\frac{k}{m} } =6.0Hz[/tex]

If the mass is doubled by the modified frequency,

[tex]f'=\frac{1}{2\pi } \sqrt{\frac{k}{2m} } \\\\f'=\frac{1}{\sqrt{2} } \frac{1}{2\pi } \sqrt{\frac{k}{m} } \\\\f'=\frac{1}{\sqrt{2} } f\\\\f'=\frac{6.0}{\sqrt{2} } \\[/tex]

f '=4.242Hz.

If the spring constant is doubled by the modified frequency,

[tex]f'=\frac{1}{2\pi } \sqrt{\frac{2k}{m}}\\\\f'=\sqrt{2} \frac{1}{2\pi } \sqrt{\frac{k}{m} } \\\\f'=\sqrt{2} f=\sqrt{2} *6[/tex]

f '=8.485Hz

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would you expect neurospora crassa dna to have a higher or lower tm than human dna? explain.
(drag & drop)

Answers

The DNA of Neurospora crassa is predicted to have a Tm that is relatively lower than that of human DNA. When compared to Neurospora crassa, the human DNA has a greater Tm value.

Given its extremely low G-C composition, An extensively utilised heterothallic filamentous fungus in genetic and biochemical studies is called Neurospora crassa. Both heterothallic and homothallic individuals belong to the genus Neurospora. N. crassa, which is commonly just referred to by its genus name, is the most thoroughly researched species. Mutagenesis has revealed a number of clock genes in Neurospora crassa that regulate circadian conidiation cycles. Frequency (frq) is a key gene that cycles at the mRNA and protein levels and participates in a negative autoregulatory feedback loop.

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A very large plastic sheet carries a uniform charge density of -6.00 nC/m^2 on one face.
a) As you move away from the sheet along a line perpendicular to it, does the electric field increase or decrease? Explain.

Answers

The work done on the unit positive charge to move away from the sheet along a line perpendicular to it and the electric field increase with distance.

What does "electric potential" mean?

Against an electric field, the amount of labour required to transport a unit charge from one location to another is known as electric potential. Although any location beyond the range of the electric field charge can be used, Earth is typically selected as the reference point. potential electricity.

How are charge and the electric field related?

The presence of an electric charge results in a modification of space known as the electric field. Between a source charge and a test charge, the electric field mediates the electric force. A vector by definition points away from positive charges and toward negative charges, which is what the field does.

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Express the force that the person exerts on the ice, F, in terms of m and g You do not need to include the force of the column of air above her. r-1 ▲ 25%

Answers

The force F can be expressed as F = m*9.8 m/s2.

What is force?

Force is a physical quantity that is a measure of an object's interaction with other objects. It is a vector, meaning it has both magnitude and direction. Force can cause an object to accelerate, decelerate, change its direction, or remain in its current state. Force is measured in newtons (N) in the SI system of units. Force is responsible for many of the phenomenon we observe in nature such as gravity and friction.

The force that the person exerts on the ice, F, can be expressed in terms of mass, m, and the gravitational constant, g, as follows: F = m*g. This force is the result of the downward acceleration of the person's mass due to gravity. The force is equal to the mass multiplied by the acceleration caused by gravity, which is 9.8 m/s2. Therefore, the force F can be expressed as F = m*9.8 m/s2.

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A spring is attached to the floor and pulled straight up by a string. The string's tension is measured. The graph in the figure shows the tension in the spring as a function of the spring's length L (Figure 1)

If the spring obeys Hooke's Law, what is the spring contract?

Answers

Hooke's Law states that when a spring is extended, the force is proportional to the length increase above the equilibrium length.

How do you determine a spring's limit?According to the Young's modulus definition: F = Y A ∆L/L. F = kL is the formula for the spring constant. (According to the corresponding magnitudes equation, L represents the size of the departure from equilibrium.) k thus equals Y A/L.Hooke's Law states that when a spring is extended, the force is proportional to the length increase above the equilibrium length. The following formula can be used to get the spring constant: The spring constant, k, has the formula k = -F/x.F = k(x – x0) (x – x0)The spring's displacement from equilibrium is measured in units of x, where k is the spring constant. The opposing direction of the spring force indicated by the negative sign indicates that it is a restoring force.

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Estimate the magnitude of the normal force n acting on an apple that rests on a flat surface.

Answers

The magnitude of the normal force acting on an object that rests on a flat surface is equal to the weight of the object, which is the force of gravity acting on it.

To estimate the magnitude of the normal force acting on an apple, we need to know its mass. On average, an apple weighs around 150 grams. To convert this to kilograms we divide by 1000, so the mass of an apple is 0.15 kg.

On substituting this values into the equation, we get:

F = m * g

F = 0.15 kg * 9.8 m/s^2

F ≈ 1.47 N

So the magnitude of the normal force acting on an apple that rests on a flat surface is approximately 1.47 N. It's worth noting that this is an estimate and the normal force could change due to various factors such as the friction of the surface, the angle of the surface, or the shape of the apple.

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Driving in a car with a constant speed of 12 m>s, you
encounter a bump in the road that has a circular crosssection, as shown in Figure 9.30. If the radius of curvature
of the bump is 35 m, find the apparent weight of a 67-kg
person in your car as you pass over the top of the bump.

Answers

As you pass over the top of the bump, the apparent weight of a 67 kg person in a car is therefore -17.80N.

What is constant speed with example?

Constant motion is a sort of motion that takes place when either the object's speed varies by the same amount every second or its distance travelled is the same every second. A car that goes continuously for 5 seconds in a straight line at 20 metres per second is said to be in motion. An object is considered to be moving at a constant speed when it covers the same distance in the same amount of time. When moving at a constant pace, an object covers a certain distance in a fixed amount of time. S = d t is a formula that can be used to express the speed.

What is uniform or constant speed?

The body is said to be moving at a uniform speed if it travels the same distance in the same amount of time. If the body goes in a straight line without changing its direction, the velocity is said to be constant. In all scenarios, there is no acceleration. Recall that the uniform velocity is a constant velocity as well.

-mg+N = -mass (v2/r) -(67(9.8) +N

= -(67(9.30/35) +N

=-17.80N

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imagine that you are sitting a distance away from a speaker, which is emitting sound waves. the air pressure, evaluated right at your ear is oscillating in time as y(x, t)

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The period of the wave  that have  Ф = 0 and ω = 2π /6 [tex]s^{-1}[/tex] is 6 sec and  the phasor representation of the wave at the three different times t = 0,2,4s is plotted in the graph .

1.1 - Given Ф = 0 , w = 2π /6 [tex]s^{-1}[/tex]

     we know , ω = 2π / T    , T =period

      2π /6  =  2π / T

      T = 6 sec

1.2 - y(x,t) = A cos ( ωt )  , here  Ф = 0 , [tex]p_{0}[/tex] is ignored .

       At t = 0 sec  ⇒ y(x,0)  = Acos( ω * 0 )  

                                            =A cos0

                                    y(x , 0) = A

       At t = 2 sec  ⇒ y(x,2)  = Acos( 2π /6 *2)

                                            = A cos( 2π /3)

                                     y(x,2) = [tex]\frac{-A}{2}[/tex]

        At t = 4 sec  ⇒ y(x,4)  = Acos( 2π /6 *4)

                                            =Acos( 4π /3)

                                      y(x,4) =  [tex]\frac{-A}{2}[/tex]

The pattern of disruption brought on by energy moving away from the sound source is known as a sound wave. Longitudinal waves are what make up sound. An example of an energy type that propagates across a material via adiabatic loading and unloading is acoustic waves. 

When energy moves through a medium (such as air, water, or any other liquid or solid substance), it creates a pattern of disruption that propagates away from the source of the sound.

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Question:

Imagine that you are sitting a distance away from a speaker, which is emitting sound waves. the air pressure, evaluated right at your ear is oscillating in time as y(x, t)=A cos ( ωt- Ф )+[tex]P_{0}[/tex]

1.1 For question ,suppose that Ф = 0 and ω = 2π /6 [tex]s^{-1}[/tex].what is the period of the wave?

1.2 plot the phasor representation of the wave at the three different times t = 0,2,4s

The pressure of a gas is 2.50 atm in a 1.60 L container. Calculate the final pressure of the gas if the volume is decreased to 1.10 liters.

Answers

So, the final pressure of the gas if the volume is decreased to 1.10 liters is approximately 3.64 atm.

Introduction

Hi! Here I will help you to solve the question about the relationship between pressure changes and volume changes in a closed system. Because there is no change in temperature, we can assume that the temperature is the same in every condition (isothermal state). In this isothermal situation, Boyle's Law will apply where the product of pressure and volume in a closed container whose temperature that kept constant is constant. The general equation of Boyle's Law is in the following equation:

[tex] \boxed{\sf{\bold{P \times V = C}}} [/tex]

With the following condition:

P = pressure of the gas in closed systemV = volume of the gas in closed systemC = constant conditionFormula Used

In this case, we can calculate the relationship between changes in pressure and changes in gas volume in a closed system with the following equation:

[tex] \boxed{\sf{\bold{P_i \times V_i = P_f \times V_f}}} [/tex]

With the following condition:

[tex] \sf{P_i}[/tex] = the pressure at initial sample[tex] \sf{P_f}[/tex] = the pressure at final sample[tex] \sf{V_i}[/tex] = the volume at initial sample[tex] \sf{V_f}[/tex] = the volume at final sample

Problem SolvingWe know that:[tex] \sf{P_i}[/tex] = the pressure at initial sample = 2.50 atm.[tex] \sf{V_i}[/tex] = the volume at initial sample = 1.60 L.[tex] \sf{V_f}[/tex] = the volume at final sample = 1.10 L.What was asked?[tex] \sf{P_f}[/tex] = the pressure at final sample = ... atmStep by step:

[tex] \sf{P_i \times V_i = P_f \times V_f} [/tex]

[tex] \sf{2.5 \times 1.6 = P_f \times 1.1} [/tex]

[tex] \sf{P_f = \frac{2.5 \times 1.6}{1.1}} [/tex]

[tex] \sf{\bold{P_f \approx 3.64 \: atm}} [/tex]

Conclusion

So, the final pressure of the gas if the volume is decreased to 1.10 liters is approximately 3.64 atm.

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