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3 years ago

Objects 1 and 2 attract each other with a electrostatic force

Physics

2 answers:

daser333 [38]3 years ago

6 0

Electrostatic force changes like the inverse square of the distance (just like gravity).

If you double the distance, you change the force to 1/4 of what it used to be.

After the move, Objects 1 and 2 attract each other with a force of (18/16) = 1.125 units .

horrorfan [7]3 years ago

5 0

Answer:

1.125

Explanation:

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The moon completes one (circular) orbit of the earth in 27.3 days. The distance from the earth to the moon is 3.84×108 m. What i

I am Lyosha [343]

Answer:

$2.72\cdot 10^{-3} m/s^2$

Explanation:

Let's start by calculating the angular velocity of the Moon. We know that the period is:

$T=27.3 d \cdot 24 \cdot 60 \cdot 60 =2.36\cdot 10^6 s$

So now we can calculate its angular velocity:

$\omega=\frac{2\pi}{T}=\frac{2\pi}{(2.36\cdot 10^6)}=2.66 \cdot 10^{-6} rad/s$

The centripetal acceleration is given by

$a=\omega^2 r$

where

$\omega=2.66\cdot 10^{-6}rad/s$

$r=3.84\cdot 10^8 m$ is the radius of the orbit

Substituting,

$a=(2.66\cdot 10^{-6})^2(3.84\cdot 10^8)=2.72\cdot 10^{-3} m/s^2$

4 0

3 years ago

Suppose a ray of light traveling in a material with an index of refraction n a reaches an interface with a material having an in

KATRIN_1 [288]

Answer: C and D

Explanation: One of the first rule for total internal reflection to occur is that the ray must move from a dense to a less dense medium, hence refractive index of medium a must be greater than that of b.

When a ray moves from a dense to a less dense medium, the refracted ray moves away from the normal thus increasing the size of the angle of refraction (total internal refraction occurs when the angle of refraction is 90° and the angle of incidence at this point is known as the critical angle), hence the angle of incidence must be greater than the critical angle.

These points verifies option C and D

5 0

3 years ago

PLS HELP FOR THIS PHYSICS TEST <br><br> (pls only answer if u rlly know, this is an important test)

lesya692 [45]

Answer:

C. 8.01 m/s²

Explanation:

vf²= vi² + 2 • a • d

2ad = vf² - vi²

a = (vf²- vi²)/2d

d=25.00 -5.00=20.00 m