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- 1. Multiple ChoiceWhat is the unit of measurement for power?JoulesWattsVoltageCalories
- 2. Multiple Choice
The equation for POWER is:
power = mass x time
power = Energy / time
power = time / water
power = Energy x time
- 3. Multiple Choice
How much energy does this appliance transfer per second?240 V50 Hz150 WN533 - 4. Multiple ChoiceA microwave has a power rating of 1550 W. How much energy does it transfer per second?1.550 Joules15.50 Joules155.0 Joules1550 Joules
- 5. Multiple ChoiceWhich appliance transfers the most energy per second?ClockLampDesktop ComputerIron
- 6. Multiple Choice
A lamp has a 120 W power rating. It is left on for 30 seconds. How much energy did it use?
3600 J
36 J
450 J
nah
- 7. Multiple Choice
A kettle transfers 1000J of energy every 2 seconds. Calculate its power.
2000 Watts
1000 Watts
500 Watts
cannot be determined
- 8. Multiple Choice
A microwave used 75 kJ of energy to heat up a lasagna. If the microwave was 750 W how long did this take?
10 minutes
100 seconds
5000 hours
i don't eat lasagna I'm not Garfield
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