1.A piece of gold has a mass of 25 g. If this gold were formed into a very thin

Question

1.A piece of gold has a mass of 25 g. If this gold were formed into a very thin sheet of thickness 0.49 mm, find the area of the sheet. Assume that it has the density of 19300kg/m^3

2.Consider an airplane window (area 0.34 m2). If the pressure inside the plane is atmospheric pressure and the pressure outside is 18% of Patm, what is the force on the window? Ignore the velocity of the airplane (i.e., ignore Bernoulli's effect).

N

3.A swimming pool of depth 2.6 m is filled with ordinary (pure) water (? = 1000 kg/m3).

Explanation / Answer

area=0.025/0.49*10^-3*19300=2.6435*10^-3 m2

2)force=(1-0.18)*0.34*10^5=27880 N

3.a)pressure at the bottom of the pool=Patm + ?gh= 10^5 +1000*9.8*2.6=125480 pa

b)so change in p=5.3*10^3

=>change in density=5.3*10^3/9.8*2.62=208

so density=1208 kg/m3

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