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3 years ago

Name two important differences between light waves and sound waves

Physics

1 answer:

emmasim [6.3K]3 years ago

8 0

Answer:

1. Light is electromagnetic waves while sound is mechanical.

Light wave is transverse and sound is longitudinal.

Explanation:

<i = <r

when distance between source and obstacle and distance between obstacle and screen is finite then the diffraction is fresnal diffraction

when distance between source and obstacle and distance between obstacle and screen is infinite then the diffraction is Fraunhofer's diffraction

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TEA [102]

I can see that they are running away like my dad did

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3 years ago

An electric pump rated 1.5 KW lifts 200kg of water through a vertical height of 6m in 10 secs: way is the efficiency of the pump

ruslelena [56]

Answer:

80%

Explanation:

Efficiency = Power output / Power input × 100 %

To calculate efficiency we need to find power output of electric pump.

We can use,

Work done = Energy change

Work done per second = Energy change per second

Work done per second = Power

Therefore, Power = Energy change per second

= Change in potential energy of water per second

=mgh / t

= 200× 10×6 / 10

= 1200 W = 1.2 kW

Now use the first equation to find efficiency,

Efficiency = $\frac{1.2}{1.5}$ × 100%

= 80 %

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3 years ago

How does air pressure change with altitude?

charle [14.2K]

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3 years ago

1. Which object is farthest from the origin at t=2sec

Stolb23 [73]

Answer:

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2 years ago

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White raven [17]

Answer:

Explanation:

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3 years ago