GCSE PHYSICS Retrieval Quiz 20

What percent energy is wasted by a machine if the energy input is 262 J and the energy output is 131 J?

• 5%

• 50%

• 100 J

Tags

NGSS.HS-PS3-1

If 68 Joules were necessary to move a 4 Newton crate, how far was the crate moved?

• 272 m
• 17 m
• 4.05 m
• 272 cm 

Tags

NGSS.HS-PS3-1

A battery is connected to a motor that lifts a mass. The chemical energy store of the battery is transferred ______ ______ to the kinetic energy store of the motor, which is transferred ___________ to the gravitational and kinetic stores of the mass.

• electrically, mechanically

• heating, radiation

• electrically, heating

• radiation, mechanically

Heat transfer in the image.

• conduction
• convection
• radiation

A barefoot student steps on a hot concrete surface. Most of the heat transferred to the student’s skin by this contact is by the process of—

• convection
• conduction
• vaporization
• radiation

What is the kinetic energy of a 4 kg shotput thrown with a speed of 13 ms^-1.

Use E_K = 1/2 m v²

• 676 J

• 52 J

• 17J

• 338 J

Which of the following quantities is not measured in the same units as the other three?

• Work

• Power

• Kinetic Energy

• Heat

The GPE of a brick which has mass 2500g and which is 3m above the floor is

• 75kJ

• 7.5kJ

• 0.75kJ

• 0.075kJ

Solids have...

• a fixed shape and a fixed volume

• a fixed shape but can change volume

• No fixed shape but a fixed volume

• no fixed shape or volume

Which state of matter can be compressed easily?

• solid

• liquid

• gas

• all of them