Question

How much heat energy is produced by 0.5 watt-hours (Wh) of electrical energy?

A) 0.5 joules
B) 1.8 joules
C) 1.5 joules
D) 2.0 joules

Answer 1

0.5 watt-hours of electrical energy is equivalent to 1,800 joules, as 1 watt-hour equals 3,600 joules. Therefore, the correct answer is B) 1.8 joules.

Step-by-step explanation:

To find out how much heat energy is produced by 0.5 watt-hours (Wh) of electrical energy, we need to convert watt-hours to joules. We know that 1 watt-hour is equivalent to 3,600 joules because 1 watt is defined as 1 joule per second, and there are 3,600 seconds in an hour. Therefore, 0.5 watt-hours can be calculated as follows:

• 0.5 Wh = 0.5 × 3,600 J
• 0.5 Wh = 1,800 J

0.5 watt-hours of electrical energy is equivalent to 1,800 joules, as 1 watt-hour equals 3,600 joules. Therefore, the correct answer is B) 1.8 joules.

So, the correct amount of heat energy produced by 0.5 watt-hours of electrical energy is 1,800 joules.

Thus, the answer to the multiple-choice question is B) 1.8 joules.