Question 1

How many calories does exercise burn?

Accepted Answer

Varies by activity and weight. Running: 100 cal/mile. Walking: 50 cal/mile. Swimming: 400-700 cal/hour.

Question 2

How do you calculate calories burned?

Accepted Answer

MET × weight (kg) × time (hours) = calories. Running (8 MET) × 70 kg × 0.5 hr = 280 cal.

Question 3

What's the difference between energy and power?

Accepted Answer

Energy (joules, kWh) is total work done. Power (watts) is energy per unit time. A 100W bulb for 10 hours = 1 kWh of energy.

Question 4

Why are there so many energy units?

Accepted Answer

Different fields developed their own: BTU for heating, calories for nutrition, joules for physics, kWh for electricity billing.

Energy Unit Converter - Free Online Tool

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