One watt equals?

One watt equals?

• A. 3.412 BTUH
• B. 3.143 BTUH
• C. 3.333 BTUH
• D. 2.845 BTUH

Answer: (A)

Converting electrical power to heat-transfer rate uses the exact relationship between watts and BTU per hour. A watt is a joule per second, while a BTU per hour is a unit of heat transfer rate. Using the standard definitions, 1 BTU ≈ 1055.06 joules, so 1 BTU per hour equals 1055.06 joules per 3600 seconds, which is about 0.293071 watts. Taking the reciprocal shows that 1 watt is about 1 / 0.293071 ≈ 3.412 BTU per hour. Therefore, one watt equals roughly 3.412 BTUH, which is the value shown in the correct option. The other numbers differ because they use different rounding or constants, and do not match the precise watt-to-BTU/hr conversion.

Converting electrical power to heat-transfer rate uses the exact relationship between watts and BTU per hour. A watt is a joule per second, while a BTU per hour is a unit of heat transfer rate. Using the standard definitions, 1 BTU ≈ 1055.06 joules, so 1 BTU per hour equals 1055.06 joules per 3600 seconds, which is about 0.293071 watts. Taking the reciprocal shows that 1 watt is about 1 / 0.293071 ≈ 3.412 BTU per hour. Therefore, one watt equals roughly 3.412 BTUH, which is the value shown in the correct option. The other numbers differ because they use different rounding or constants, and do not match the precise watt-to-BTU/hr conversion.