3 years ago

True or False. Electromagnetic waves travel fastest through a vacuum.

Physics

1 answer:

olya-2409 [2.1K]3 years ago

4 0

This
is
true
Electromagnetic waves travel fastest through vacuum

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A child’s toy rake is held so that its output arm is 0.75 meters. If the mechanical advantage is 0.33, what is

Masja [62]

Input= ?
Output= 0.75
MA= 0.33

So I just kept on Dividing numbers until I was close to "0.33" & I cam up with the answer of .......... 0.25.

So when you divide 0.25 by 0.75 you get the MA of 0.33

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Normal atmospheric pressure at sea level is ?

iris [78.8K]

1 bar or 100 000 pascales. Or 1020 hPa. It kinda differentiates.

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At NASA's Zero Gravity Research Facility in Cleveland, Ohio, experimental payloads fall freely from rest in an evacuated vertica

Diano4ka-milaya [45]

Answer:

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(b) velocity is 51.43m/s

Explanation:

(a).

The potential energy $P$ of the payload of mass $m$ is at a vertical distance $h$ is

$P =mgh$ .

Therefore, for the payload of mass $m = 50kg$ at a vertical distance of $h = 132 m$ , the potential energy is

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$\boxed{P = 64,680J}$

(b).

When the payload reaches the bottom of the shaft, all of its potential energy is converted into its kinetic energy; therefore,

$mgh= \dfrac{1}{2}mv^2$

$v= \sqrt{2gh}$

$v = \sqrt{2*9.8*135}$

$\boxed{v = 51.43m/s}$

(c).

The velocity in mph is

$\dfrac{51.43m}{s} * \dfrac{3600s}{hr} * \dfrac{1mile}{1609.34m}$

$\boxed{v= 115.0mph}$

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3 years ago

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Answer:

The correct answer is option ( D ) Yoga

Explanation:

hope it helps you dear :)

have a nice day

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Lelechka [254]

D. mechanical to elastic

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3 years ago