The power of a machine is the rate at which it does work. What is “power” measured in? A. newtons B. joules C. watts D. ohms 相关知识点: 试题来源: 解析 C。“power”功率的单位是瓦特(watts)。选项 A“newtons”是力的单位牛顿;选项 B“joules”是功的单位焦耳;选项 D“ohms”是电...
How long does it take to do {eq}432 {/eq} joules of work with {eq}75 {/eq} watts of power? Power: The term power can be explained as the measure of energy conveyed by the system in a particular time interval. This quantity can be evaluated by the taking fraction ...
Power, being the amount ofwork done per second. is measured in watts (joules / see).阅读理解选择最佳答案1. In the language of science, which of the following descriptions shows that we aredoing some work?A. We push against a big rock, and it hardly moves.B. We push against a big ...
The lowest difficulty level is 1.0. The higher the number, the more difficult the solution is to find. The difficulty level on March 9, 2024 (measured on March 7) was 79.35 trillion. You might see this published as 79.35T.3 Why Bitcoin Needs Miners Blockchainminingis the computational wor...
Even when the changes in the skin caused by UV and visible light overlap, it generallyrequires a lot more visible lightto cause a similar change. Light energy is usually measured in these studies in joules per square centimetre (J/cm²). ...
Current (I) is a rate of flow and is measured in amps (A). Ohms (R) is a measure of resistance and is analogous to the water pipe size. Current is proportional to the diameter of the pipe or the amount of water flowing at that pressure. ...
Space has four dimensions. Time is one of those dimentions measured in meters just like the other three. Asecondis in reality 300 thousand kilometers. (this means the speed of light is actually 1, without units) Mass is NOT equivalent to energy:Mass IS Energy ...
How much work is required to turn an electric dipole 180 degrees? If a heat engine operated entirely without friction, would it then be 100% efficient? Explain. Name the physical quantity which is measured in (a) kWh (b) kW (c) Wh ...
In an elevator which is accelerating downward at 2.5 m/s 2 , a 25-kg block hangs from a spring attached to the ceiling of the elevator. If spring gets stretched by 0.15 m, find its spring constant. If you perform 10 joules of work lifting a 10 N box from the floor...
Mainly the watt-hour meter comprises a tiny motor and a counter. The motor will operate by diverting the exact fraction ofcurrentflowing in the circuit to be measured. The motor’s speed is directly proportional to the amount of current flowing through the circuit. ...