Work and Energy Flashcard

Front

What is the formula to calculate energy in watt-hours?

Back

Energy (Wh) = Power (W) × Time (h)

Front

How many watt-hours does a 100 watt light bulb use if lit for 10 hours?

Back

1000 watt-hours

Front

What appliance typically uses 100 kWh per year?

Back

Computer

Front

What type of metals are released into the atmosphere by coal burning?

Back

Radioactive and toxic metals

Front

What percentage of CO2 emissions does geothermal energy produce compared to coal?

Back

10%

Front

What is 1 joule per second equivalent to?

Back

1 Watt

Front

Define watt-hour.

Back

A unit of energy equivalent to one watt of power used for one hour.

Front

What is the relationship between power, energy, and time?

Back

Power is the rate at which energy is used or produced over time.

Front

What is the significance of CO2 emissions in energy production?

Back

CO2 emissions contribute to climate change and global warming.

Front

Explain the concept of renewable energy.

Back

Energy from sources that are naturally replenished, such as solar, wind, and geothermal.