One watt is equivalent to

One watt is equivalent to

• A. 1,000 Btu
• B. 3,413 Btu
• C. 3.413 Btu
• D. 746 Btu

Answer: (C)

The main idea here is converting between power units. A watt measures how much energy is transferred per second, while a Btu is a unit of energy. To compare them you convert to Btu per hour, which is a power unit in the British system. Calculate it step by step: 1 watt = 1 joule per second. One Btu is about 1055.06 joules. So 1 watt equals (1 J/s) ÷ (1055.06 J) ≈ 0.0009478 Btu per second. Multiply by 3600 seconds per hour to get Btu per hour: 0.0009478 × 3600 ≈ 3.412 Btu/h, which is typically written as about 3.413 Btu/h. So the value 3.413 Btu (interpreted as Btu per hour) is the correct match for one watt. The other options represent different quantities: they’re either too large or refer to energy amounts rather than a rate.

The main idea here is converting between power units. A watt measures how much energy is transferred per second, while a Btu is a unit of energy. To compare them you convert to Btu per hour, which is a power unit in the British system.

Calculate it step by step: 1 watt = 1 joule per second. One Btu is about 1055.06 joules. So 1 watt equals (1 J/s) ÷ (1055.06 J) ≈ 0.0009478 Btu per second. Multiply by 3600 seconds per hour to get Btu per hour: 0.0009478 × 3600 ≈ 3.412 Btu/h, which is typically written as about 3.413 Btu/h.

So the value 3.413 Btu (interpreted as Btu per hour) is the correct match for one watt.

The other options represent different quantities: they’re either too large or refer to energy amounts rather than a rate.