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GaryK [48]
3 years ago
9

If a ball is rolling across the floor, what are 3 factors that cause it to slow down and eventually stop if it doesn't encounter

an obstacle?
Physics
1 answer:
klasskru [66]3 years ago
4 0

Answer:

Friction, weight, kinetic energy.

Explanation:

#Friction due to the rough surface.

#Weight since it's pulling the ball down.

#Later on, kinetic energy would decrease by time and would lead the mechanical energy to decrease. And there is no Gravitational Potential Energy.

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In a cyclotron, the orbital radius of protons with energy 300 keV is 16.0 cm . You are redesigning the cyclotron to be used inst
dem82 [27]

Answer:

r_\alpha=16cm

Explanation:

The radius of the circumference described by a particle in a cyclotron is given by:

r=\frac{mv}{qB}(1)

m is the particle's mass, v is the speed of the particle, q is the particle's charge and B is the magnitude of the magnetic field.

Kinetic energy is defined as:

K=\frac{mv^2}{2}=\frac{m^2v^2}{2m}\\

Solving this for mv:

mv=\sqrt{2mK}(2)

Replacing (2) in (1):

r=\frac{\sqrt{2mK}}{qB}

For protons, we have:

r_p=\frac{\sqrt{2m_pK}}{eB}(3)

For alpha particles, we have:

r_\alpha=\frac{\sqrt{2m_\alpha K}}{(2e)B}(4)

Dividing (4) in (3):

\frac{r_\alpha}{r_p}=\frac{\frac{\sqrt{2m_\alpha K}}{(2e)B}}{\frac{\sqrt{2m_p K}}{(e)B}}\\r_\alpha=\frac{r_p}{2}\sqrt{\frac{m_\alpha}{m_p}}\\r_\alpha=\frac{16cm}{2}\sqrt{\frac{6.64*10^{-27}kg}{1.67*10^{-27}kg}}\\r_\alpha=\frac{16cm}{2}(\sqrt{3.98})\\\\r_\alpha=\frac{16cm}{2}(2)\\r_\alpha=16cm

4 0
4 years ago
When an apple is cut, it often turns brown. What does the color change indicate?
IrinaK [193]

When an apple is cut (or bruised), oxygen is introduced into the injured plant tissue. When oxygen is present in cells, polyphenol oxidase (PPO) enzymes in the chloroplasts rapidly oxidize phenolic compounds naturally present in the apple tissues to o-quinones, colorless precursors to brown-colored secondary products. so it will be c

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3 years ago
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How long does it take the earth to complete one revolution in seconds?
elena-s [515]
86,400 is the amount of seconds in a day. :)
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3 years ago
PLANETARY MOTION: When the masses of two objects are doubled, which of the following would happen to the gravitational force bet
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Answer:

So as the mass of either object increases, the force of gravitational attraction between them also increases. If the mass of one of the objects is doubled, then the force of gravity between them is doubled.

Explanation:

Welcome

8 0
2 years ago
A string is being driven by a motor with a frequency of 10 Hz. If the speed of the waves travelling down the string is equal to
garri49 [273]

Answer:

λ = 2.4 m

Explanation:

The speed of a wave is defined as the product of the frequency and the wavelength of that wave:

v = f\lambda

where,

v = speed of wave = 24 m/s

f = frequency of wave = 10 Hz

λ = wavelength of the wave = ?

Therefore,

24\ m/s = (10\ Hz)\lambda\\\\\lambda = \frac{24\ m/s}{10\ Hz}

<u>λ = 2.4 m</u>

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3 years ago
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