3 years ago

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Physics

1 answer:

gregori [183]3 years ago

7 0

Answer:C

Explanation:

I did the test

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In the equation F = Kq1 q2/r2 solve for q2. Solve for r.

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Answer:

r = √(k q₁ q₂ / F)

Explanation:

F = k q₁ q₂ / r²

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F r² = k q₁ q₂

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r = √(k q₁ q₂ / F)

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A record turntable rotates through 5.0 rad in 2.8 s as it is accelerated uniformly from rest. What is the angular velocity at th

Usimov [2.4K]

Answer:

$\omega_f = 3.584\ rad/s$

Explanation:

given,

turntable rotate to, θ = 5 rad

time, t = 2.8 s

initial angular speed = 0 rad/s

final angular speed = ?

now, using equation of rotational motion

$\theta = \omega_i t + \dfrac{1}{2}\alpha t^2$

$5 = 0+ \dfrac{1}{2}\alpha\times 2.8^2$

$\alpha= \dfrac{10}{2.8^2}$

α = 1.28 rad/s²

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$\omega_f = \omega_i + \alpha t$

$\omega_f =0 +1.28\times 2.8$

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2 years ago

Imagine a particle that has three times the mass of the electron. All other quantities given above remain the same. What is the

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Answer:

The only parameter that changes is mass m

It is only necessary to calculate the ratio Eh/Ee

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The kinetic energy of the heavy paricle is three times the kinetic energy of an electron

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3 years ago