A dam produces 400 watts of electrical energy. What is the efficiency of the dam?

A 0.63kg mass rests on top of a vertical spring with spring constant 65N/m. When the mass sits at rest, determine the distance that the spring is compressed from it's equilibrium position.

A motor does 3,441 joules of work in 13.66 seconds. What is the power of the motor?

Calculate the orbital period for Jupiter's moon Io, which orbits 4.22*105km from the planet's center (M=1.9*1027kg).

14. The % daily values found on a food label are based on A. whether the food is all-natural or processed. B. the time of year. C. a 2,000-calorie diet. D. whether the person is a man or woman.

Which theory was first proposed by Albert Einstein? A. the theory of special relativity B. the theory of universal gravitation C. the theory of inertia D. the theory of radioactivity ... the answer is A i just found out

They are generally thought to be blank naturally occurring emotions that are present from birth

If an aircraft is loaded 90 pounds over maximum certificated gross weight and fuel (gasoline) is drained to bring the aircraft weight within limits, how much fuel should be drained?

3. Shortwave radio is broadcast between 3.50 and 29.7 MHz, To what range of wavelengths does this correspond? Why do you suppose this part of the spectrum is called shortwave radio?

How does a star's temperature change as the star ages from a main sequence star to a red giant and from a red giant to a white dwarf?

What factors in the atmosphere seem to have the greatest effect in the amount of radiation received from the sun?