Energy
Electricity
Forces
Waves
100
What type of energy is found in fuel?
chemical potential energy
100
What is the instrument used to measure current?
ammeter
100
A force cannot change the ............. of an object.
mass
100
What do waves transfer?
Energy
200
What is energy?
The ability to do work.
200
What electrical component is represented by this diagram?
variable resistor
200
Convert 48 minutes into hours.
0.8 hours
200
What is the lowest point of a wave called?
trough
300
Describe the energy change that occurs when you shoot a rubber band.
elastic potential energy to kinetic energy
300
What happens to the effective resistance when two resistors are connected in series compared to parallel?
the resistance increases
300
At which stage of the journey is the object stationary?
B
300
What type of waves are used for satellite communications?
microwave
400
A cup of ice milo was placed on a table. Eventually the drink became warm.
Explain why this happens.
Heat / thermal energy moves from the surrounding air to the milo causing its temperature to rise.
400
Calculate the energy consumed if an electrical water heater with a power rating of 3.8 kW is turned on for 30 minutes.
1.9 kWh
400
State the formula for acceleration.
400
What electromagnetic wave is used for EZ-Link fare card signals?
radio waves
500
A heater converts 120,000 J of electrical energy into heat in 30 seconds.
Calculate the power of the heater.
120000 / 30 = 4000 W
500
A lamp has a voltage rating of 9 V and current of 2 A.
Calculate the power of the bulb.
18 W
500
A man drove 8 km for 10 minutes. He then parked the car for 20 minutes before driving another 22 km for 30 minutes.
Calculate his average speed (km/h).
30 km/h
500
Describe what is meant by amplitude.
The distance from the crest / trough to the rest position.