Physics HW

Q1: Convert each of the following:

1. 1040 mmg = ______________________________ Pa

1. 3.35 atm = ________________________________ Pa

1. 20.4 KPa = _____________________________ mmHg

Q2: Calculate the pressure at 25 m under sea level. (= 1.025 X 103Kg/m³ . P_o= 101325 Pa )

Q3: 14.8 g of Neon gas filled up a 950 mL cylinder at a temperature of 18 ^oC. Find the pressure of the gas.

(Atomic Mass of Ne = 20.18 g/mol , R = 0.082L.atm.K^-1.mol^-1 = 8.314L.Pa.K^-1.mol^-1 )

Q4: Calculate the depth in the ocean where the pressure is ten times greater than the atmospheric pressure. (= 1.025 X 10³Kg/m³ . P_o= 101325 Pa )

Q5: 20 g of Helium gas filled up a 150 mL cylinder at a temperature of 33 ^oC. Find the pressure of the gas.

(Atomic Mass of Ne = 4.0 g/mol , R = 0.082L.atm.K^-1.mol^-1 = 8.314L.Pa.K^-1.mol^-1 )

Q6: In a car braking system A piston has a radius of 11 mm connected to the brakes that have a piston of a radius of 8 cm. If the applied force on the small piston is 55 N. Calculate:

1. The pressure applied on the small piston.
2. The force on the larger piston.