2. The average atmospheric pressure at sea level is approximately 101 000 Pa. If the density of air at 0◦C is approximately 1.3 kg , how high does the atmosphere extend?

Answer 1

figure the weight of a 1m^2 column of air.
Pressure=weight/area=desityair*1m^2(Height)
101kPa= 1.3kg/m^3 * 1m^2* h*9.8N/kg

h= 101000/(1.3*9.8)== 7930 m
check my math.