Which of these is an example of a mechanical wave?

ocean waves

microwaves used to heat food

x-ray

light from a flashlight

ocean waves

it is correct i took the quiz

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Ocean waves are the mechanical wave.

Explanation :

The waves that require medium to transport energy from one location to another is called the mechanical wave. There are two types of mechanical waves i.e. longitudinal wave and transverse waves.

The ocean wave is a longitudinal wave.  

Microwaves used to heat food, x rays and the light from a flashlight are electromagnetic waves. These waves require a medium to propagate.

Hence, the correct option is (A) " ocean waves ".

work: w = fd (given)

work done by chet   =50*1 = 50 j

work done by mika =40*2 = 80 j

work done by sara =30*1.5 = 45 j

work done by bill =60*0.5 = 30 j

students in order from the greatest amount of work done to the least is mika> chet> sara> bill

hence option (b) is correct.

c.the charges if the proton and electron and gravity