Energy Unit Conversions

What is the SI unit of energy?

• Joule

• Watt

• Newton

• Pascal

If a system has an energy of 5000 Joules, how many kilojoules is this equivalent to?

• 5 kJ

• 50 kJ

• 500 kJ

• 0.5 kJ

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

• 4.184 joules

• 0.238 joules

• 4184 joules

• 1 joule

Which of the following is a unit of energy?

• Watt

• Joule

• Ampere

• Volt

How many joules are in a kilowatt-hour?

• 3.6 million joules

• 3600 joules

• 36,000 joules

• 360,000 joules

What is the energy conversion when a battery powers a flashlight?

• Chemical to light

• Electrical to chemical

• Light to chemical

• Mechanical to electrical

Tags

NGSS.HS-PS3-3

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

• 432,000 joules

• 120 joules

• 7200 joules

• 4320 joules

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NGSS.HS-PS3-1

Convert 10 electronvolts (eV) to joules. (1 eV = 1.602 x 10^-19 joules)

• 1.602 x 10^-18 joules

• 1.602 x 10^-20 joules

• 16.02 x 10^-19 joules

• 1.602 x 10^-19 joules

What is the energy conversion in a hydroelectric power plant?

• Mechanical to electrical

• Chemical to electrical

• Thermal to mechanical

• Nuclear to thermal

Tags

NGSS.HS-PS3-3

Which of the following is NOT a unit of energy?

• Joule

• Calorie

• Watt

• Kilowatt-hour