Amachine is supplied energy at a rate of 4,000 w and does useful work at a rate of 3,760 w. what is the efficiency of the machine? a. 97 percent b. 96 percent c. 94 percent d. 92 percent

An automobile of mass 2000 kg moving at 30 m/s is braked suddenly with a constant braking force of 10000 n. how far does the car travel before stopping?

In which of the following cases is work being done on an object? question 2 options: pushing against a locked door carrying a box down a corridor pulling a trailer up a hill suspending a heavy weight with a strong chain

What is a neurotransmitter involved in mood reward, addiction, and motor behaviors?