3 years ago

Help! Will mark brainliest! Explain why a mechanical wave does not exist in a vacuum.

1 answer:

7 0

Light waves are a wave in the electromagnetic field, this field may exist in a vacuum. Sound needs either solid, liquid, or gas to propagate and therefore it is called a mechanical wave. Sound is a form of energy which is transferred by vibrating air molecules if motions of propagation is air.

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The International Date Line

geniusboy [140]

Answer:

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1) Which of the following is the best example of a physical change?

never [62]

1 is b and 2 is also b

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4 years ago

5. A 25 kg object travels a distance of 90 m in 30 s. Find the momentum

xz_007 [3.2K]

Answer:

★ v = d/t

★ v = 90/30

★ v =3

Acc to question

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Hope it help

6 0

3 years ago

Read 2 more answers

Calculate the tempature of a 0.50 mol sample of a gas at a pressure of 0.987 atm and a volume of 12 L

dalvyx [7]

Answer:

The temperature is 288, 88K

Explanation:

We use the formula PV= nRT:

T= PV/nR

T= 0,987 atm x12 L/0,50 mol x 0,082 l atm/K mol

T=288,88K

6 0

3 years ago