A machine is supplied energy at a rate of 4000 watts and does useful work at a rate of 3761 watts what

is the efficiency of the machine

Which geologic activity is most likely to occur when two lithospheric plates converge? Volcanic island form over a hot spot in the ocean an underwater ridge forms in the middle of an ocean a series of valleys form between low mountains mountains

What property of sound enables us to distinguish one sound source from another?

Describe the processes of fuel ignition and combustion?

A man climbs a wall that has a height of 8.4 meters and gains a potential energy of 4,620 joules. His mass is about ___ kilograms.

Which game represents a wave

If a spacecraft that seems to be motionless in deep space is given some type of quick push, what will happen? A. The spacecraft will not move because it only works on earth. B.

A fast, white water cascade is also known as what?

What is a stack of membranes that packages chemicals

Under what condition (s) will an object be in equilibrium? Notice that equilibrium in physics has a broader definition. (A) Only if it is moving with constant velocity. (B) Only if it is at rest.

If a pressure gauge measure an increase in 3*10^ (5) Pa on an area of 0.7 m^2, calculate the increase in the force applied to the area?