Abrick is dropped from rest from a height of 4.9 m. how long does it take for the brick to
reach the ground?

t=1s

Explanation:

Using the formula

s=ut+1/2at^2

4.9 = (0)(t) + 1/2(9.8)(t^2)

4.9 = 4.9(t^2)

t^2 = 1

t = 1

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heat the gas and measure the pressure