Question

Suppose that a person eats a diet of 2400 Calories per day

1. Convert this energy into joules.

Express your answer using four significant figures.

2.Convert this energy into kilojoules.

Express your answer using four significant figures

3. Convert this energy into kilowatt-hours.

Express your answer using four significant figures.

Answer 1

Answer 2

1. To convert Calories to joules, we use the conversion factor: 1 Calorie = 4.184 joules.

Energy in joules = 2400 Calories * 4.184 joules/Calorie

Energy in joules = 10056.96 joules

Rounded to four significant figures, the energy in joules is approximately 10060 joules.

2. To convert Calories to kilojoules, we use the conversion factor: 1 Calorie = 4.184 kilojoules.

Energy in kilojoules = 2400 Calories * 4.184 kilojoules/Calorie

Energy in kilojoules = 10056.96 kilojoules

Rounded to four significant figures, the energy in kilojoules is approximately 10060 kilojoules.

3. To convert joules to kilowatt-hours, we use the conversion factor: 1 kilowatt-hour (kWh) = 3.6 x 10^6 joules.

Energy in kilowatt-hours = 10056.96 joules * (1 kWh / 3.6 x 10^6 joules)

Energy in kilowatt-hours = 0.0027936 kWh

Rounded to four significant figures, the energy in kilowatt-hours is approximately 0.002794 kWh.

Answer 3

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