Energy Unit Conversions

What is the energy equivalent of 1 kilowatt-hour (kWh) in joules?

• 3.6 million joules

• 360 joules

• 36,000 joules

• 360,000 joules

If a light bulb uses 60 watts of power, how much energy does it consume in 2 hours?

• 120 watt-hours

• 120 joules

• 120 kilowatt-hours

• 120,000 joules

Convert 500 calories to joules. (1 calorie = 4.184 joules)

• 2092 joules

• 2000 joules

• 2500 joules

• 4184 joules

• 2.07 eV

• 3.31 eV

• 4.14 eV

• 5.25 eV

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-3

How many joules are in 1 British Thermal Unit (BTU)?

• 1055 joules

• 252 joules

• 4184 joules

• 1000 joules

A battery stores 5000 joules of energy. How many watt-hours is this?

• 1.39 watt-hours

• 1.5 watt-hours

• 1.25 watt-hours

• 1.11 watt-hours

Convert 2 megajoules (MJ) to kilowatt-hours (kWh).

• 0.556 kWh

• 0.5 kWh

• 0.6 kWh

• 0.7 kWh

If a heater uses 1500 watts, how much energy does it consume in 3 hours in kilowatt-hours?

• 4.5 kWh

• 3.5 kWh

• 5.5 kWh

• 6.5 kWh

Tags

NGSS.HS-PS3-1

What is the energy in joules of a system that has 10 kilocalories? (1 kilocalorie = 4184 joules)

• 41840 joules

• 4184 joules

• 418400 joules

• 4184000 joules

Convert 1 gigajoule (GJ) to kilowatt-hours (kWh).

• 277.78 kWh

• 1000 kWh

• 3600 kWh

• 500 kWh

Tags

NGSS.HS-PS3-3