Final answer:
One watt is equal to 1 joule/second, which means the rate at which work is done or energy is transferred when one joule of energy is used in one second is equal to one watt.
Step-by-step explanation:
The student asked: What is one watt equal to? The options provided are: 1) 1 n-m, 2) 1 joule/second, 3) 1 newton x meter, 4) Cannot be determined. The correct answer to this question is option 2) 1 joule/second. This is because a watt is the SI unit of power, and it is defined as the rate at which work is done or energy is transferred. When one joule of energy is used in one second, this constitutes a power of one watt. Therefore, 1 watt = 1 joule/second (1 W = 1 J/s). One watt is equivalent to one joule per second. The watt is the unit of power, and power is defined as the rate at which work is done or the rate at which energy is transferred or converted. Therefore, 1 watt is equal to 1 joule of energy transferred or converted per second. The other options represent different units but are not equivalent to one watt.