2 years ago

How are sound waves different from light (and other electromagnetic, waves?

Physics

1 answer:

Blababa [14]2 years ago

8 0

Sound waves travel faster

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When a 4.60-kg object is hung vertically on a certain light spring that obeys Hooke's law, the spring stretches 2.30 cm. (a) If

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a) y = 0.0075 m

b) W = 1.569 J

Explanation:

See attachment for the solution

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2 years ago

Which has the most kinetic energy?

lara31 [8.8K]

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I think A golf ball shot out of a small cannon

Explanation:

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A total solar eclipse is a rare event. Although they occur somewhere on earth every 18 months on average, it is estimated that t

Setler79 [48]

Because the tip of the moon's shadow ... the area of "totality" ... is never more than a couple hundred miles across, It never covers a single place for more than 7 minutes, and can never stay on the Earth's surface for more than a few hours altogether during one eclipse.

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An electric motor with a 1200 hp output drives a machine with an efficiency of 60%. What is the energy output of the machine per

kirill [66]

Answer:

536,904 J/s

Explanation:

The energy output from motor is the input energy in the machine.

We know that efficiency is percentage energy ouput to energy input, and expressed as

$n=\frac {E_o}{E_i}$

Where n and E represent efficiency and energy respectively, subscripts o and i represent output and input respectively. Since for the machine we have the input energy then the output will be the product of efficiency and input energy

Energy output=0.6*1200 hp=720 hp

Converting hp to J/s we multiply by 745.7

Energy is 720*745.7=536,904 J/s

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2 years ago

Need amswer fast plz

FrozenT [24]

Answer:

I need this for may schooling

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