| Quiz | Energy |
|---|---|
| Name | |
| Result | PASSED |
| Score | 27 / 30 (90%) |
| Passing score | 24 |
| Quiz took | 4 min 26 sec |
| Quiz finished at | 2023-03-26 15:59:37 |
A motor transfers 100 J of energy by electricity. 60 J are transferred as kinetic energy. 12 J as sound energy and 28 J as thermal energy. Calculate the efficiency of the motor.
Name the energy store that best describes the food in your belly, from your last meal
Another term for friction from air is
How much energy does a 800 W microwave use when operating for 5 minutes?
A 12 N weight is moved 6 m. Calculate the work done
What is the kinetic energy of a 4 kg bowling ball moving at 4 metres per second?
Name the main energy store in a moving bike
Energy cannot be
What energy transfer is occurring in a falling rain drop?
Name the energy store in a loose roof tile, which is about to fall
Which of the following could be used to minimise heat loss from your home?
Work done is another name for
What are the units for energy
Name the main energy store in a cup of tea
Use pen and paper to calculate the velocity of a 4 kg mass which has kinetic energy of 200 J
Calculate the elastic potential energy of a spring that has been stretched from 20 cm in length to 30 cm in length and has a spring constant of 100 N/m
What is the height of a 5 kg mass that has a GPE of 300 J? Assume g = 10 m/s2.
Name the main energy store in a stretched spring
Name the main energy store in jet fuel
What is the extension of a 50 N/m spring that stores 100 J
The brakes of a car transfer
What is the power of a hairdryer that uses of 180 kJ of energy in 2 minutes
A total of 300,000 J of electrical energy is required to raise the temperature of a metal block of mass 2.8 kg from 18 °C to 52 °C. Calculate the specific heat capacity of the metal block in J/kg °C.
Friction always
Explain the main energy change in a car's engine
Which of these is not a renewable source of energy?
What is the approximate GPE of a 3 kg bowling ball on a 10 m high shelf? Assume g = 10 m/s2.
Which of these is not a fossil fuel?
A 0.5 kg stone falls from a height of 5 m. By considering the gravitational potential energy of the stone and the kinetic energy of the stone, calculate the stone's velocity just before it hits the ground. Assume g = 10 m/s2.
2 kg of water is heated from 20 °C to 40 °C. The specific heat capacity of water is 4200 J/kg °C. Calculate the change in thermal energy.