What is the momentum of a child and wagon if the total mass of the child and wagon is 22 kg and the velocity is 1. 5 m/s?.

The work done during the process is  506.2 J.

The work done during the process is calculated by applying the following equation.

W = PΔV

W = P ( Vf - Vi )

where;

The final volume of the system is calculated as follows;

Vf = A x h

Vf = 7.4 x 10⁻³ m² x 7.2 x 10⁻² m

Vf = 5.33 x 10⁻⁴ m³

W = 9.5 x 10⁵ Pa x ( 5.33 x 10⁻⁴ m³ - 0 )

W = 506.2 J

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The tangent component, as it always pulls the bob in the direction of equilibrium (and is not balanced by the tension from the pendulum arm).

Another mechanical mechanism that oscillates is the straightforward pendulum. It consists of a point mass "m" hung from a fixed support by a light, inextensible string of length L. The gravitational force is what causes the motion to move in a vertical plane.

The length and gravitational acceleration of a basic pendulum are the only factors that govern its period. Other elements, such mass, have no effect on the time at all.

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D. 36 in Kr

Let's analyze all the elements in Option

By looking at all the given options we can clearly see that Krypton has the highest number of electrons as compared to the given options so It is the answer. Also with the highest mass, in the given four options.

It can be easily seen in options as the Number of electrons and mass is already written in options.

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An advantage of electromagnets over bar magnets is that you can easily vary the strength of the magnetic field.

An electromagnet is a type of magnet that is created when an electric current passes through a coil of wire. It produces a magnetic field due to the current flowing through the coil. Electromagnets are used in a wide variety of applications, such as motors, generators, speakers, and magnetic separation equipment. Electromagnets have the advantage of being able to be switched on or off, which allows them to be used in a controlled manner. They are also able to be adjusted in strength, which makes them very versatile and powerful. Electromagnets are also used in magnetic resonance imaging (MRI) machines, where they create a magnetic field that is used to take images of the body's internal structures.

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The force that exists between the charges is calculated as 1.296 * 10^-18 N.

It is the force of attraction between two opposing charges, protons and electrons.

The electric force between charged bodies at rest is called electrostatic force or Coulomb force. Although the law was known earlier, but it was first published in 1785 by French physicist Charles-Augustin de Coulomb. It is the force of attraction between two opposing charges, protons and electrons.

Given, q1 = q2 = 6 *10^-6

and r = 0.5m

F= 1/4πc * q1 q2/r²

As 1/4πc = 9* 10^-9

= (9* 10^-9 * 6*10^-6*6*10^-6)/0.5²

= 1.296 * 10^-18 J

The force that exists between the charges is 1.296 * 10^-18 N.

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The person will do 8222.3 Joules of work on the sled if she drags it.

Work is a physics term used to describe the energy transfer that takes place when an object is moved over a distance by an external force, at least some of that is applied in the direction of the displacement.

Given, angle made by the rope θ = 20°

displacement, s = 125m

force, F = 70N

Positive work is done by the force's displacement-direction component.

W = Fcosθ.s

W = 70N(cos20°)125m.

W = 8222.3 Joules

Since it is perpendicular to the distance, the force's vertical component does NOTHING. In other words, it is ineffective at moving the sled. Since it is the horizontal component of the force that moves the object, it is effective.

The person will do 8222.3 Joules of work on the sled if she drags it.

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With the use of formulas, For the first question, W = 22.8 J, Time = 1.43 s. For the second question, W = 1000000J, P = 534,522.48 Watts

Power can simply be defined as the rate at which work is done. It is measured in Watt.

Given that a delivery man lifts a package with a 12 N force at a constant velocity. If the package is lifted from the ground to the mailbox 1.9 m and the delivery man exerts 16 W of power, then

a.  the work done W = F × S

W = 12 × 1.9

W = 22.8 J

b. The time taken to lift it can be found by using power formula

P = W/t

16 = 22.8/t

t = 22.8/16

t = 1.43 s

Given that a  2800 kg car exerts a constant force of 20,000 N while traveling across 50 m. Assume the car starts from rest.

a. Work W done by the car = F × S

W = 20000 × 50

W = 1,000,000 J

b. To know how much power is exerted by the car, let us first find the speed of the car.

K.E = Work

1/2mv² = F × S

1/2 × 2800 × v² = 1000000

1400v² = 1000000

v² = 1000000/1400

v² = 714.28

v = √714.28

v = 26.7 m/s

Power P = F × V

P = 20000 × 26.73

P = 534,522.48 Watt

Therefore, the power exerted by the car is 534,522.48 Watts

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Answer: 11 meters

Explanation: i'm rlly sorry if i am wrong

The energy that makes up a system's temperature, or thermal energy, is said to be present in the system.The required thermal energy is 2360J.

The energy that makes up a system's temperature, or thermal energy, is said to be present in the system.

Thermal energy is emitted as heat.Thermodynamics, a distinct field of physics, examines how work is accomplished via the transmission of heat between various systems (see the first law of thermodynamics).

Mass of aluminum  = 25g

Melting point  = 658°C

Latent heat of melting  = 94.4j/g

Unknown:

Amount of heat require for melting = ?

The amount of heat required for this melting will be the product of the mass of the aluminum and the latent heat of melting;

H = m L

m is the mass

L is the latent heat of melting

insert the parameters and solve;

H = 25 x 94.4 = 2360J

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The amount of charge given that the energy transferred is 5.25 kilojoules and the voltage is 15 volts will be 0.35 coulombs.

Charge is a property of matter that describes the amount of electrical energy in a substance. It can be positive or negative, and it is measured in units called coulombs. Objects with the same charge will repel each other, while objects with different charges will attract each other. This is the basis of Coulomb's Law and for how electricity works.

The charge, measured in coulombs (C), can be calculated by using the formula:

charge = energy transferred / voltage

charge = 5.25 kJ / 15 V

charge =  0.35 C

Therefore the charge will be 0.35 coulombs.

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Impulse is important because it is the force that changes an object's momentum.

Momentum is a physical concept that describes the movement of an object due to the product of its mass and velocity. Momentum is a vector quantity, meaning it has both a magnitude and a direction. In classical mechanics, momentum is conserved, meaning that the total momentum of a system remains constant over time.

In the examples given, impulse is what allows the elevator to be hoisted up, the nylon ropes to hold a climber's weight, the runner to move around the track, and the plane to take off from the runway. Without impulse, none of these activities would be possible.

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Answer:

False

Explanation:

False ... a mechanical wave needs a medium of particles to propagate....a vacuum has no particles

The minimum value of the coefficient of static friction is 1.33.

To calculate the minimum value of the coefficient of static friction, we need to determine the force of static friction acting on the block. The force of static friction is equal to the force of gravity acting on the block (mg) multiplied by the coefficient of static friction (µs

m = 14.26kg

θ = 41°

g = 9.8 m/s²

The force of gravity acting on the block is given by the formula:

Fg = mg

where,

m =  (mass of the block)

g =  (acceleration due to gravity)

Fg = 14.26kg *9.8 m/s²

Fg = 139.75 N

The force of static friction can be found using the formula:

Fstatic = µs * N

where,

µs = coefficient of static friction (unknown)

N = Normal force acting on the block

The normal force acting on the block is equal to the force of gravity acting on the block perpendicular to the ramp.

N = mg * cos(θ)

where,

θ = 41 degrees (incline of the ramp)

N = 14.26kg * 9.8 m/s² * cos 41°

N = 105.47 N

So,

Fstatic = µs * (mg * cos(θ))

making µs subject of the formula and substituting already calculated vaues we get,

µs =      Fstatic

          (mg * cos(θ))

µs =    139.75 N

         105.47 N

µs = 1.33

This is the minimum value of the coefficient of static friction.

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The object is traveling at 10 m/s.

Momentum is defined as the product of an object's mass and velocity. The formula for momentum is:

p=mv

where,

p = momentum

m = mass

v =  velocity

We can use this formula to find the velocity of an object given its momentum and mass. To solve for velocity, we can divide both sides of the equation by mass:

velocity = momentum/mass

In this case, the object has a mass of 40 kg and a momentum of 400 Kgm/s, so we can plug in these values to find the velocity:

velocity = 400 Kgm/s / 40 kg = 10 m/s

Therefore, the object is traveling at 10 m/s.

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Since the object is experiencing free fall, if you ignore air resistance, the time it will take the container to fall 300m to the ground is 7.82 seconds.

Any motion of a body in which gravity is the only force acting on it is referred to as free fall.

The object dropped from the airplane is experiencing free fall.

Ignoring air resistance, the only force acting on the container is the force of gravity which accelerate the container by a constant value.

The time taken for the object to reach the ground is determined using the formula of an object  experiencing free fall as given below:

s = ut + ¹/₂gt²

where

h is the height above the ground = 300 m

u is the initial vertical velocity of the container and is equal to zero since the object starts from rest.

g is the acceleration of gravity = 9.8 m/s²

t is the time = ?

The equation above becomes;

h = ¹/₂gt² since u is zero

Solving the equation for t:

t = √2h/g

t = √2 * 300 / 9.8

t = 7.82 seconds.

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Complete question:

A 415-kg container of food and water is dropped from an airplane at an altitude of 300m. First, consider the situation ignoring air resistance. Then calculate the more realistic situation involving a drag force provided by a parachute.

1. If you ignore air resistance, how long will it take the container to fall 300m to the ground?

The speed of the penny after 2.5 seconds is 25 m/s. The result is obtained by using the equation in uniformly accelerated straight motion.

A uniformly accelerated straight motion is a motion of an object moving with acceleration or deceleration in a straight line.

The equations apply in vertical dimension are

v₁ = v₀ + gt

v₁² = v₀² + 2gh

h = v₀t + ½ gt²

Where

A penny is dropped off the top of the Statue of Liberty, 93 m tall.

Find the speed of the penny after 2.5 second! (assuming no air resistance)

A dropping off penny has an initial speed of 0.

v₁ = 0

We used g = 10 m/s.

So, the speed at time t = 2.5 s would be

v₁ = v₀ + gt

v₁ = 0 + 10(2.5)

v₁ = 25 m/s

Hence, after 2.5 seconds, the penny will have the speed of 25 m/s.

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Answer:

9 hours

Explanation:

When the 2nd car catches up to the first, both cars will have gone the same distance.  

Distance = rate x time

Distance car 1 traveled when car 2 catches up = 90 mph(3 hr + t)

Distance car 2 traveled when it catches up to car 1 = 120t

90(3 + t) = 120t

270 + 90t = 120t

30t = 270

t = 270/30 = 9 hrs

Therefore, 12 hours after car 1 leaves the city and 9 hours after car 2 leaves the same city, they meet up.  

To prove it:

90(12) = 120(9) = 1080    Car 2 catches up to Car 1 1080 miles from the city

The Earth's gravitational pull on the satellite is 651.8 N. Consequently, the satellite's gravitational pull on Earth is 651.8 N. As a result, the spacecraft accelerates at a rate of 1.5 m/s2.

Centripetal force is used to maintain an object moving in a circle due to gravity. Since gravity always behaves perpendicular to motion, it has no effect on an item in a circular orbit.

Mass of Telescope= 8410 kg

revolution in minutes = 927

G = 6.67 × 10-11 N ∙ m2/kg2

Mass of earth = 6.0 × 1024 kg

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The net force acting on the book is 7N right.

The net force is defined as the total of all forces exerted on an object. Net force is essential since it aids in describing the motion of an item and can be used to calculate acceleration. The first law of motion of Isaac Newton states that an object in motion will remain in motion and an object at rest will remain at rest unless acted upon by a net force that is imbalanced. This indicates that knowing the net force acting on an object will aid in predicting its velocity.

In this case, we are given that:

Force F1 = 10 N pulling to the right

Force F2 = 3 N pulling to the left

Let's assume the right is positive and the left is negative.

To calculate the net force, we can use this following formula:

Fnet = F1 + F2

Fnet = 10 + (-3)

Fnet = 7

As the result, the net force would be 7 N.

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Answer:

Number b and c are true

B. The object's mass would be the same on the Moon.

C. The object's weight would be the same on the Moon.

The distance moved by an object when it acted by a net force 1 N and time 3s is found to be 0.9m

According to this, an object's rate of change in velocity is directly proportional to the force used and moves in the direction of the applied force. The equation: summarises it. Mass (kg) times acceleration (m/s2) equals force (N). A constant mass item will therefore accelerate in direct proportion to the force exerted.

F = ma

acceleration = F/m => 1/5

v= u + at, u=0 (initially at rest);

v=at = distance/t = at;

S = distance => ut + 1/2at^2

=> 0 + 1/2 x 1/5 x 9 => 0.9m

the distance traveled by object in the given time 3s = acceleration x t2

The acceleration is determined by dividing the net force by the mass. An object's acceleration doubles if the net force exerted on it also doubles. Increased mass will result in a halving of acceleration. If the mass and net force are both doubled, the acceleration will remain constant.

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A net force of 1.0 N acts on a 5.0-kg object, initially at rest, for 3.0 seconds. What is the distance the object moves during that time?

Different types of plate interactions at plate boundaries can cause earthquakes of varying strengths, at various depths, which can be caused by both forces underneath Earth's surface and volcanic eruptions.

Plate interactions refer to the forces and mechanisms that cause the movements and interactions of the Earth’s plates. These interactions are driven by convection currents in the Earth’s mantle, which are generated by the heat energy released by the Earth’s core. The plates move in different directions, resulting in different types of plate interactions. The most common type of plate interaction is called divergent boundaries, which occur when two plates move away from each other.

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Answer: D

Explanation:

energy the top states in the nation for nuclear power electricity production is North Carolina. The contributions of natural gas-fired energy over the previous ten years.

nuclear energy Nuclear energy contributed for 33% of North Carolina's net generation in 2021, placing the state in the top five states for production. North Carolina was one of the top ten states in 2020 for both total annual motor fuel spending and petroleum consumption.

one of the main ways to produce energy is through the combustion of natural gas. Describe it in detail.Sunlight is the principal energy source on Earth's surface and can.As the effects of global warming worsen, North Carolina must go nuclear. Nuclear energy will become the best solution for clean, dependable, and economical electricity, and recent state legislation compels Duke Energy to dramatically cut carbon emissions by 2030.

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Answer:

  focal length = 30 cm

Explanation:

You want the focal length of a convex mirror when moving the mirror an additional 15 cm away from the object causes its image size to decrease from 1/2 to 2/5 the size of the object.

The relation between focal length (f), object distance (do) and image distance (di) is ...

  1/f = 1/do +1/di

The ratio of heights is the same as the ratio of distances:

  hi/ho =di/do

If we let do represent the original object distance, then (1/2)do = di, the original image distance. This gives one equation we need:

  1/f = 1/do +1/(1/2do) = 3/do

Moving the mirror increases the object distance to (do+15). Now, the equation becomes ...

  1/f = 1/(do+15) +1/(2/5(do+15)) = 7/(2(do+15))

Substituting for 1/f, we have ...

  3/do = 7/(2(do +15))

  6(do +15) = 7do . . . . . . . . . cross multiply

  90 = do . . . . . . . . . . . . subtract 6·do

Then the focal length is ...

  1/f = 3/do

  f = do/3 = 90/3 = 30

The focal length of the mirror is 30 cm.

The value of the coefficient of kinetic friction is 0.32.

The value of the coefficient of friction is calculated by applying Newton's second law of motion as shown below.

Ff = ma

where;

μmg cosθ = ma

μg cosθ = a

μ = a / ( g cosθ )

where;

The value of the coefficient of kinetic friction is calculated as;

μ =  ( 2.361 m/s² )  / ( 9.8 m/s² x  cos41 )

μ = 0.32

Thus, the value of the coefficient of kinetic friction between the block and the inclined ramp is a function of the acceleration of the block and the angle of inclination of the ramp.

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Answer:

Light energy is a kind of kinetic energy with the ability to make types of light visible to human eyes. Light is defined as a form of electromagnetic radiation emitted by hot objects like lasers, bulbs, and the sun.

When, During the game, the ball experiences a net force of 0 newtons. It is sitting still is the statement explains what is most likely happening with the ball.

The vector sum of the various or single forces exerted on a particle or object is termed as the net force. The original force's affect on the motion of the particle the force is exerted is replaced by the net force, which is a single force.

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