100 404 Physics for Everyday Life Revision Quiz 2

When energy enters a system and then comes out of the system later, the law of conservation of energy states that-

• some of the energy that entered the system will remain in the system.

• the energy entering the system can be greater than the energy leaving

• the amount of energy coming out of the system must equal the energy that entered the system.

• the form of energy that comes out of the system must be the same form that entered.

• the energy will always create a change in the properties of the parts of the system.

If a horse reared up on 2 legs, what effect would it have on the pressure?

• It will exert quarter the pressure it did before

• It will exert half the pressure it did before

• It will exert the same pressure it did before

• It will exert twice the pressure it did before

• It will exert four times the pressure it did before

Which of these animals would probably cause the greatest pressure on the ground?

• A dog with big feet

• A cow with small feet

• A mouse with small feet

• A cat with big feet

• A goat with small feet

What is the equation used to calculate pressure?

• Pressure = Force x Mass

• Pressure = Mass/Volume

• Pressure = Area/Force

• Pressure = Area x Force

• Pressure = Force/Area

If a piston has an area of 2cm2 and a force of 5N is applied, what is the total pressure?

• 10N/cm2

• 5N/cm2

• 0.4N/cm2

• 0.8N/cm2

• 2.5N/cm2

In a syringe, why does pushing the plunger decrease the volume of air inside?

• To increase pressure

• To measure pressure

• To decrease pressure

• To double pressure

• To maintain pressure

What is the purpose of a sphygmomanometer in medical practice?

• Measure atmospheric pressure

• Monitor blood pressure

• Measure body temperature

• Evaluate oxygen levels

• Assess pulse rate

Which of the following is an application of pressure in everyday life?

• Riding a bicycle

• Reading a book

• Watching television

• Using a computer mouse

• Cooking with a pressure cooker

Why does it become harder to breathe as you ascend a high mountain?

• Decrease in gravity

• Increase in temperature

• Increase in oxygen concentration

• Decrease in atmospheric pressure

• Increase in atmospheric pressure

How does a life jacket help a person stay afloat in water?

•    Life jackets decrease water density.

• Life jackets increase the person's weight.

• Life jackets decrease the buoyant force.

• Life jackets increase the person's density.

• Life jackets increase the buoyant force.