Mind map
Power
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Power
Definition
- The rate at which energy is transferred, or the rate at which work is done.
Note: Energy transfer of 1 joule per second = 1 watt of power
Large Powers
- 1kW = 1 000W (103 W) 1MW = 1 000 000 W (106 W)
Formulas
- Power= energy transferred/time
- Power= work done/time
Units
- Joules
- Watts
- Seconds
Examples
- If a 2,000W kettle boils for 100 seconds, how much energy is used? Energy = Power x Time 2,000 x 100 = 200,000 Joules
- A PC has a 800W power supply. How long is it used for if it transfers 32,000J of energy? Time = Energy ÷ Power 32,000 ÷ 800 = 40 seconds
Information
- Description
- This is a mind map all about power.
- Created by
- Rhianna Sangha
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