2 years ago

After earning a learners license what test must be successfully passed to earn an operator's license

Physics

1 answer:

yarga [219]2 years ago

7 0

Drivers test? Or some sort of written test?

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An arrow leaves a bow at 60 m/s at an angle of 30 degrees to the horizon.

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Answer: 11

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2 years ago

Which waves require a material medium for transmission? a.) light waves b.) radio waves c.) sound waves d.) microwaves

shepuryov [24]

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mechanical waves require a medium

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2 years ago

At a stoplight, a truck traveling at 15 m/s passes a car as it starts from rest. The truck travels at constant velocity and the

Art [367]

The time that the car take to catch up to truck would be :

1/2 ar^2 = vt

1/2 (3) t^2 = 15t

1.5 t^2 = 15t

t ^2 = 10s

Hope this helps

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3 years ago

Which question cannot be answered through making measurements?

Margarita [4]

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3 years ago

A meter stick A hurtles through space at a speed v = 0.25c relative to you, with its length aligned with the direction of motion

yaroslaw [1]

Answer:

$L_0\approx1.0328\ m$

Explanation:

Given:

relativistic length of stick A, $L=1\ m$

relativistic velocity of stick A with respect to observer, $v=0.25c=7.5\times 10^{7}\ m.s^{-1}$

<em>Since the object is moving with a velocity comparable to the velocity of light with respect to the observer therefore the length will appear shorter according to the theory of relativity.</em>

<u> Mathematical expression of the theory of relativity for length contraction:</u>

$L=\frac{L_0}{\gamma}$

where:

L = relativistic length

$L_0=$ original length at rest

$\gamma =$ Lorentz factor $=\frac{1}{\sqrt{1-\frac{v^2}{c^2} } }$

$\Rightarrow 1=\frac{L_0}{\frac{1}{\sqrt{1-\frac{(0.25c)^2}{c^2} } }}$

$L_0=\frac{1}{\sqrt{1-\frac{(0.25c)^2}{c^2} } }$

$L_0\approx1.0328\ m$

4 0

2 years ago