Ryleetarver

31.01.2020 • 

Physics

Which of the following is true about air pressure acting on an object?

a. the amount pushing down on the object will gradually decrease with time
b. the amount pushing up on the object will gradually increase with time
c. there is more air pressure pushing up on the object than there is pushing down
d. there is just as much air pressure pushing up as there is pushing down on the object

Ответ:

josephrosanne18

17.01.2022

Physics

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The answer is D. Why? because there is a constant variable. there has to be a constant.

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Ответ:

lanettejohnson355

30.07.2020

Physics

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Given that:

time (t) = 20 s ,

        S = ?

We know that S = ut + 1/2 at²     meters

                       since free fall, a = g = 9.81 m/s² ; u =0 ;

                        S = 0 + 1/2 × 9.81 × 20²

                        S= 1962 m

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