WorksheetsP1. Energy Stores and Transfers
Total questions: 20
Worksheet time: 10mins
Which of these is not an energy store
Sound
Thermal
Electrostatic
Gravitational potential
When an object is dropped what is the energy transfer that happens?
kinetic to gravitational potential
gravitational potential to kinetic
What energy store is in a battery
Nuclear
Chemical
Thermal
An object with a mass of 3kg has been lifted 2m from the floor. Calculate the GPE of the object ( gEarth= 9.8N/kg)
(a)
As an object falls, what energy store increases?
Gravitational potential energy
Kinetic energy
Elastic potential energy
What is meant by efficiency?
How much energy is wasted
How much energy is used usefully
The proportion of the total energy that is usefully transferred
The proportion of the total energy that is wasted
100J is transferred to a lamp which wastes 60J heating the surroundings. What is the percentage efficiency of the lamp?
60%
160%
40%
What are the units for energy?
Joules (J)
Watts (W)
Volts (V)
Tick which equations are correct:
E= m x g x h
Power = Energy x Time
E = 1/2 x m x v
E= 1/2 x m x v2
Energy = Power x time
What is meant by a thermal insulator
It lets heat escape easily
It keeps heat in
It has a low specific heat capacity
It takes very little time to heat up
A student does an experiment to see which material would keep the temperature of a cup of water warmest for longest. What is their INDEPENDENT variable ?
The water
The cup
The material
The temperature
A student does an experiment to see which material would keep the temperature of a cup of water warmest for longest.. What is his DEPENDENT variable?
The temperature of the water
The material
The water
The cup
Which of these use NON-RENEWABLE resources
Coal
Wind turbines
Nuclear Power station
Geothermal power station
Hydroelectric dam
Which energy store is being described:
Using convection currents caused by the sun electricity is generated by large turning blades.
Hydroelectric dam
Wind Turbines
Biomass
Which energy store is being described?
Water is heated directly using large arrays of mirrors.
Solar power
Wave power
Geothermal
Which energy store is being described here?
This renewable energy store requires the growing of crops, like sugar, to turn into alcohol to power cars
Biomass
Biofuel
Oil
A 200W games console is on for 3 hours. Calculate the energy transferred in J
600J
36,000J
2,160,000J
720,000J
A student estimates the energy transferred by their teachers 44W laptop across a week. They suggest it is used for 9hours a day 5 days a week. How many seconds is this in total?
32,400s
45s
162,000s
9,720,000s
The student wants to know the power of the 44W laptop in kW. What is it?
4.4kW
0.44kW
0.044kW
0.0044kW
A 0.9kW microwave is on for 30 minutes, calculate the energy transferred in kWh. Don't type the units!
(a)
