If you have a device that has an energy efficiency of 0.4 and you put in 100 units of energy, how many units of useful energy will you get out of it?

Which type of plate boundary is most closely associated with the formation of new ocean floor? a) hot spot b) transform c) divergent d) convergent

A boat crosses a 200m wide river at 3m/s, north relative to water. The river flows at 1m/s as shown. What is the velocity of the boat as observed by a stationary observer on the river back from the boat departed?

a ball on a string makes 25.0 revolutions in 9.37s, in a circle of radius 0.450m. what is its velocity? (unit=m/s)

A 500 kilogram marlin and a 20 kilogram salmon are swimming at the same velocity. How does the momentum of the two fish compare? A. The marlin has more momentum. B. The salmon has more momentum. C. Both have the same momentum. D.

A uniform magnetic field is perpendicular to the plane of a wire loop. If the loop accelerates in the direction of the field, will a current be induced in the loop? Explain why or why not.

Which of the following choices best represents a potential stressor?

How do you distinguish between speed, velocity, and acceleration?

The force of friction on a sliding object is 10n. the applied force needed to maintain a constant velocity is:

What is the best hypothesis to use for this investigation

Quantum physics would most likely be needed to understand the motion of which of the following? A. an atom B. a cell C. a ball D. a galaxy