Gases laws -G9

A hydraulic system is used to lift a weight F1=1962 N vehicle in an auto garage. If the vehicle sits on apiston of area A1=0.5 m² and a force is applied to a piston of area A2=0.03 m^2, what is the minimum force that must be applied to lift the vehicle, F2?

• 118N

• 10N

• 100N

• 220N

A barber raises his customer's chair by applying a force of F1=49 N to a hydraulic piston of area A1=0.05

m². If the chair’s weight is F2=123 N. Find the area of the attached piston, A2.

• 0.13 m²

• 1.1 m²

• 2.45 m²

• 0.45 m²

A weather balloon has a volume of 100.0 L when it is released from sea level, where the pressure is 101 Pa. What will be the balloon’s volume when it reaches an altitude where the pressure is 43.0 Pa?

• 234.88L

• 324.56L

• 34.88L

• 24.52L

At approximately what temperature is the volume of Gas A about 700 mL?

• 250K

• 150K

• 300K

• 375K

A hydraulic lift is used to lift a heavy box that is pushing down on a 3.0 m² piston with a force of 1,500 N. What force needs to be exerted on a 0.08 m² piston to lift the box?

• 40 N

• 400N

• 4N

• 1N

A special ball has a volume of 31.2 L at a temperature of 313 K, what will the temperature of the ball be if

the volume decreases to 28.4 L under constant pressure?

• 0.35 K

• 2.8K

• 285 K

• 343 K

A 2.0 L balloon at room temperature (20.0°C) is placed in a refrigerator at 3.0°C. What is the volume of the balloon after it cools in the refrigerator?

• 1.9 L

• 3L

• 1L

• 5L

A helium balloon has a volume of 2.00 L at 101 kPa. As the balloon rises the pressure drops to 97.0 kPa. What is the new volume?

• 2.08L

• 5.2L

• 1.05L

• 7.7L

A diver who is 10.0 m underwater experiences a pressure of 202 kPa. If the diver’s surface area is

1.50 m² , with how much total force does the water push on the diver?

• 303000N

• 512886N

• 2500N

• 20000N