6th grade science pls help

The train velocity (speed) at the end of 100km will be 10m/s.

The train starts from rest and moves through a distance of 1 km in 100 km with a uniform acceleration. The formula for velocity at the end of a certain time period is calculated by the following formula:

where:

v = final velocity (speed)

u = initial velocity (0 m/s, since the train starts from rest)

a = acceleration (0.01 m/s^2)

t = time (100,000 seconds, since the train travels 1 km in 100 km)

v = u + at

v = 0 + (0.01 m/s²)(100,000 s)

v = 10 m/s

It means at and after 100km onward, the train will be moving at a speed of 10m/s. The train's velocity increases linearly with time due to the uniform acceleration, and after 100 km of travel, it reaches a final velocity of 10 m/s.

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The velocity after 8 seconds 15 m/s. the acceleration of the object m/s² 2.

What is velocity ?

Velocity is a vector quantity that expresses both the speed and direction of an object's motion. It can be described in terms of both magnitude and direction, and is measured in terms of meters per second (m/s). Velocity is an important concept in physics because it is used to describe the motion of objects. In addition, it is used to calculate the force of an object, the acceleration of an object, and the momentum of an object.

Velocity is an important concept in physics and engineering, as it is used to measure the rate at which objects move, as well as the rate of change of an object's motion. Velocity can also be used to calculate the work done on an object and to determine the direction of an object's motion.

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The speed of each seat is 4.71 m/sec, if the radius of the rotating platform is 3.7 meter. If a child of 49.5 kg sits in a seat, then the tension in the chain will be 648.4 N.

Mass of each seat, m = 10 kg

Radius of the rotating platform, R = 7.4/2 = 3.7 m

Let the tension in the chain = T₁

Vertical angle made by the chain = 26.6°

There will be two components of the tension in chain. Vertical component of the chain will be balanced by the weight(mg) of the seat.

T×cos26.6 = 10 ×9.81

T = (10×9.81)/cos26.6

T = 109.7 N

Horizontal component of the tension in chain is balanced by the centrifugal force due to the circular motion of radius,

R₁ =  3.7 + 1.81×sin26.6

R₁ = 4.51 m.

Centrifugal force, F = mv²/R₁

(10×v²)/4.51 = 109.7 × sin26.6

(10×v²)/4.51 = 49.12

v² = (49.12 × 4.51)/10

v = 4.71 m/sec

If a child of mass 49.1 sits on the seat, then the total weight on the seat will be, W = (10+49.1) × 9.81 = 579.77 N

This weight will be balanced by the vertical component of the tension in the chain,

579.77 = T×cos26.6

T = 579.77/cos26.6

T = 648.4 N

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The true weight of the goods is being marked up by 0.0126%.

The percentage markup can be found using the formula:

distance moved  x 100%

original distance

In this case, the original distance is 79 cm and the distance moved is 0.99 cm, so the formula would be:

= 0.99 x 100%

    79

= 0.0126%

Hence, the true weight of the goods is being marked up by 0.0126%.

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At the time of care, giving patients accurate, complete, and current information. facilitating quick access to patient records to improve coordination and effectiveness of service.

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The mass of the load is 50,000N/m multiplied by 10.0cm, which is 500,000N.

Hooke's law states that the force (F) required to extend or compress a spring by some distance (x) scales linearly with respect to that distance—that is, Fs = kx, where k is a constant factor characteristic of the spring (i.e., its stiffness) and x is small in comparison to the total possible deformation of the spring.

B. Using Hooke's law, F = kx, where F is the force of the truck's hock, k is the spring constant, and x is the compression of the hock. Rearranging for mass, m = F/g, where g is the acceleration due to gravity. Thus, m = kx/g, or m = (50,000N/m * 10.0cm)/9.8m/s^2, which yields 500,000N.

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The torque about the pivot is positive, after the push has ended the ball's angular velocity will hold steady, right after the push has ended the torque would be zero.

Torque is a measure of force that can rotate an object around a fixed axis. as the ball is moving in the same direction in which the force is applied. So the torque will be positive. After the push has ended the ball will continue to rotate at the constant angular velocity, as the pivot is frictionless, so no opposing force will decrease the angular velocity of the ball. So the ball's angular velocity will hold steady.

After the push has ended, the torque will be zero. Torque is defined as follows:

Torque = force × distance from the rotation axis

The pushing force is zero so the torque will also be zero.

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The distance a car will travel in 3 s if it's acceleration was 5 m/s² is 22.5m and is denoted as option B.

This is defined as the rate at which velocity changes with time and is usually in terms of both speed and direction which makes it a vector quantity.

Acceleration = velocity / time

5 m/s² = v / 3s

v = 15m/s.

To calculate the distance we can use:

D = 1/2*a*t²

 =  1/2 × 5 × 3²

= 22.5m.

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The efficiency of this machine is 66.67%.

What is efficiency?

Efficiency is a measure of how well a machine or system is able to convert input energy into useful output energy. It is a ratio of the output energy to the input energy, expressed as a percentage.

An efficient machine or system is one that is able to convert a large portion of the input energy into useful output energy, with minimal energy loss. Conversely, an inefficient machine or system is one that loses a significant portion of the input energy as waste heat, sound, or other forms of energy that are not useful to the desired output.

The efficiency of a machine can be calculated using the formula:

Efficiency = (Energy Output / Energy Input) x 100%

In this case, the energy input is 7.55 and the energy output is 5.05, so we can calculate the efficiency as follows:

Efficiency = (5.05 / 7.55) x 100% = 66.67%

Therefore, the efficiency of this machine is 66.67%.

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The pulse traveled 1.25 cm in 2.5s. with 0.5 cm/s

From the equation of motion in 2 dimensions d = v*t ...... ( i )

As

where the time taken is 2.5 s

the velocity of pulse is 0.5 cm/s

to find the distance covered in a given time which a velocity of 0.5 m/s

so from equation (i)

So the distance it will be covered is 1.25 cm

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A mass on a spring undergoes simple harmonic motion. When the mass passes through the equilibrium position, its instantaneous velocity is maximum.

Simple harmonic motion or SHM is the alternating motion of an object that passes through a certain balance point. SHM has a fixed frequency and amplitude and is periodic, namely movements that occur regularly and are repeated at the same time.

When a spring undergoes simple harmonic motion, the mass accelerates in a direction toward the equilibrium point, then the velocity of the object at the equilibrium point is maximum. The object is accelerating in a direction toward the equilibrium point. Acceleration caused by the force recovered.

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The magnitude of the average force exerted on the ball  is 4992 N.

Force is the product of mass and acceleration. The S.I unit of force is newton(N)

To calculate the magnitude of the average force, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the average force is 4992 N.

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The minimum value for the roller coaster car’s centripetal acceleration at the top of the loop is g downward.

When the roller coaster car is going at less than the minimum speed, it means there will be too much force, and the roller coaster car will fall from the track. At the minimum speed, the centripetal force at the top of the loop will be exactly equal to the force of gravity, mg, since no normal force will be needed.

The normal force is the force which surfaces exert to prevent solid objects from passing through each other. Normal force is a contact force. If two surfaces are not in contact, they cannot exert a normal force on each other.

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Answer:

Sound waves are examples of A. or longitudinal waves

In 1898, the Curies' study of pitchblende led to the discovery of both the substances radium and polonium.

The original purpose of pitchblende extraction was to create coloring agents for the glassmaking industry. By analyzing pitchblende, the German geologist Klaproth discovered uranium in 1789. A.H. Becquerel made the discovery of radioactivity in 1896. A naturally occurring organic substance is pitchblende. It is the main source of uranium ore, which is present there as uranium oxide, or U3O8. Risks include those brought on by radiation and dust particles.

Even more astonishingly, Marie discovered that a uranium rock known as pitchblende included two potently radioactive new elements that she dubbed polonium and radium after her native Poland.

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The free-fall acceleration at the surface of planet 2 is g = 8 m/s². The result is obtained by comparing the accelerations due to gravity on planet 1 and planet 2.

The free-fall acceleration can be counted by the following formula.

g = GM/R²

Where

Planet 1 has the free-fall acceleration at its surface of 16 m/s². Planet 2 has the radius and the mass twice those of planet 1.

Find the free-fall acceleration at the surface of planet 2!

If g, M, and R are the parameters of planet 1, let's say g', m, and r are the parameters of planet 2. So,

The acceleration due to gravity on planet 2 is

g/g' = (GM/R²)/(Gm/r²)

g/g' = (M/R²)/(m/r²)

g/g' = Mr²/mR²

g/g' = M(2R)²/(2M)R²

g/g' = 4MR²/2MR²

16/g' = 2/1

g' = 16/2

g' = 8 m/s²

Hence, the acceleration due to gravity on planet 2 is 8 m/s².

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Heavy elements, such as gold, silver, and mercury, as well as the elements that make up the earth's core, such as iron and nickel, originated in the hearts of stars. They were created through the process of nuclear fusion, which occurs when the temperatures and pressures inside a star are high enough to overcome the electrostatic repulsion between the positively charged nuclei of atoms.

When fusion occurs, the nuclei of the atoms merge, creating a new, heavier element. This process is called nucleosynthesis. The fusion of lighter elements, such as hydrogen and helium, produces heavier elements, such as carbon, oxygen, and neon.

Therefore, most heavy elements, such as gold and platinum, are created in supernovae, massive explosions that occur when the fuel in a star runs out, and the star collapses under its own gravity. The intense pressure and temperatures that are created during the collapse cause the nuclei of atoms to fuse together, creating elements with atomic numbers higher than iron.

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The temperature can rise 234° C in each of the four 3.5 kg steel brake disks.

Energy cannot be created or destroyed, according to the law of conservation of energy. However, it is capable of change from one form to another. An isolated system's total energy is constant regardless of the types of energy present.

According to law of conservation of energy:

1/2 × 1600 × 42.8² = 4 × 3.5 × 448 × Δt

Δt = (1600 × 42.8² )/( 2 ×  4 × 3.5 × 448)

Δt = 234° C.

Hence, the temperature can  rise 234° C in each of the steel brake disks.

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MLA style is most commonly used to cite sources within the language arts, cultural studies, and other humanities disciplines.

The Modern Language Association or better known as the MLA style is a citation issued by MLA with a simple design. The aim is to make it easier for writers to write citations. Usually this style is used in the fields of Humanities and English.

the characteristics of MLA Styles' writing are:

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Since frequency is the reciprocal of period, the frequency of the spring is 2 Hz

Frequency can be defined as the number of complete revolution per second made by a vibrating body.

Given that a weight suspended from a spring is seen to bob up and down over a distance of 28 cm twice each second.

This means that its Period T = t/n

Where

T = 1/2 = 0.5 s

Frequency is an inverse of period. That is,

F = 1/T

F = 1/0.5

F = 2 Hz

Therefore, the frequency of the spring is 2 Hz

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The order of intermolecular forces among the given compounds will be as follows: H F > H Cl > H Br > H I

Electronegativity is defined as the property of the element to attract the shared pair of electrons towards itself.

Strongest intermolecular forces of attraction means that the electronegativity difference between the elements forming bond is more, more polar is the bond.

Electro negativities of the elements are:

Hydrogen: 2.1

Fluorine: 3.98

Chlorine: 3.16

Bromine: 2.96

Iodine: 2.66

Electro negativity difference in H F = 3.98 - 2.1 = 1.88

Electro negativity difference in H Cl = 3.16 - 2.1 = 1.06

Electro negativity difference in H Br = 2.96 - 2.1 = 0.86

Electro negativity difference in H I = 2.66 - 2.1 = 0.56

As, the electronegativity difference of H F is the highest, so it has the strongest intermolecular forces of attraction.

Thus, the order of intermolecular forces among the given compounds is H F > H Cl > H Br > H I.

The given question is incomplete. The complete question is attached in the below attachment.

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Therefore, the amount of work done on the lawnmower is: W=Fdcosθ=(37 N)(20 m)cos15∘≈710J if is the amount of work the person.

Work is force applied over distance. Examples of work include lifting an object against the Earth's gravitation, driving a car up a hill, and pulling down a captive helium balloon. Work is a mechanical manifestation of energy. The standard unit of work is the joule (J), equivalent to a newton - meter.

Work is defined as transferring energy into an object so that there is some displacement. Energy is defined as the ability to do work. Work done is always the same. Energy can be of different types such as kinetic and potential energy.

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Kinetic energy is affected by the mass (m) and speed (v) of an object. If an object with mass m moves with speed v, then it can be said that the object has a kinetic energy of:

                          KE = 1/2 x mv2

In the given problem:

The speed of the soda bottle from a height of 0.8 meters is 4 m/s.

KE = 1/2 x mv2

KE = ½ x 0.125 x (4)2

KE = ½ x 0.125 x 16

KE = 1 Kgm²/s²

KE = 1/2 x mv2

KE = ½ x 0.250 x (4)2

KE = ½ x 0.250 x 16

KE = 2 Kgm²/s²

KE = 1/2 x mv2

KE = ½ x 0.375 x (4)2

KE= ½ x 0.375 x 16

KE = 3 Kgm²/s²

KE = 1/2 x mv2

KE = ½ x 0.500 x (4)2

KE = ½ x 0.500 x 16

KE = 4 Kgm²/s²

Complete the questions is:

Calculate the change in the kinetic energy (KE) of the bottle when the mass is increased. Use the formula KE = mv2, where m is the mass and v is the speed (velocity). Assume that the speed of the soda bottle falling from a height of 0.8 m will be 4 m/s, and use this speed for each calculation. Record your calculations in Table A of your Student Guide.

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I would suggest him to use curved lines to articulate the energy and movement motion n his drawing

Arcs of lines may be referred to as curves segments, rays, or lines depending on how they are linked.

The numerous types of curves include simple curves, closed curves, simple closed curves, transcendental curves, and algebraic curves.

A curved line that encircles a central point is what is referred to be a circle. The line is continuously and uniformly curved. If a circle can be folded into two identical pieces, it is considered to be symmetrical.

Thus curved lines can be used to best articulate the feeling.

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Answer:

Curved

Explanation:

The moon of Jupiter, Ganymede is the largest moon in the solar system. The mass of Jupiter when the orbital period and the distance from the centre of the orbit are given is calculated to be 1.57 × 10²⁷ kg.

The time required to complete one revolution in an orbit around the planet is known as the Orbital Time period of motion. The orbital distance's cube is directly proportional to the square of the time period.

Given that,

Orbital distance R = 1.07 × 10⁹ m

Time period T = 6.18 × 10⁵ s

We know the formula of time period as,

T² = 4 π² R³/ G M

where, M is the mass of Jupiter

G is the gravitational constant

(6.18 × 10⁵)² = 4 π² (1.07 × 10⁹)³/(6.67 × 10⁻¹¹) M

Making M as subject, we have,

M = 4 π² (1.07 × 10⁹)³/[ (6.67 × 10⁻¹¹) (6.18 × 10⁵)²] = 1.57 × 10²⁷ kg

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Answer:

Explanation:

I will assmune that "frequency of 1. 5 x 1015 hz" is actually "frequency of 1. 5 x 10^15 hz"

The wavelength and frequency of light are related by the expression C = λ f  , where C is the speed of light  (3x10^8 m/s), λ is the wavelength (in m), and f is the frequency (in 1/sec or Hz).

   C = λ f  

   (3x10^8 m/s) = λ (1. 5 x 10^15 sec^-1)

   λ =     (3x10^8 m/s)/(1. 5 x 10^15 sec^-1)

   λ =    2.00x10^-7 m

 E=hf, where h is Plank's constant (6.62606957×10-34 J·s)

 E = (6.62606957×10-34 J·s)*(1.5x10^15s^-1)

 E = 9.94x10^-19 J

The force of drag acting on the skydiver is 795 N upwards.

When a parachutist jumps from a plane, only one force is acting on him, namely the force of gravity (the weight of the parachutist) so that the parachutist moves down. When jumping from a height when parachuting, the force of gravity will pull us down very quickly. Thus, we will freefall very quickly

Given in the questions: Constant velocity = 54.4 m/s

According to Newton's first law, when the net resultant force on an object is 0, the object is moving at a constant speed or is at rest and remains at rest. So, we know the resultant force is 0.

Now we use Newton's second law.

Resultant force = ma

Resultant force = Driving force (acting downwards) - Resistive force (acting upwards)

                       0 = mg (weight) - drag

                  drag = mg

                 drag = 795N upwards

Complete the questions:

A skydiver is falling at a constant velocity of 54.4 m/s. Gravity is producing a downward force of 795 N. What is the force of drag acting on the skydivers?

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The charge is on the second sphere  9.67×10⁻⁶ C.

Charge is the product of current and time.

To calculate the charge on the second sphere, we use the formula below

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the charge is  9.67×10⁻⁶ C.

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The power in watts of the Pokemon Machamp that uses 237N of force to move a huge boulder 83 m in 5s is 3,934.2Watts.

Power refers to the measure of the rate of doing work or transferring energy.

The quantity that has to do with the rate at which a certain amount of work is done is known as the power. The power of a substance can be calculated using the following formula;

P = Work done ÷ time

Since work = Force × distance

Power = (Force × distance)/time

Power = (237 × 83)/5

Power = 3,934.2Watts

Therefore, 3,934.2Watts is the power of the Pokémon machamp.

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