Why is it impossible to build a machine that produces more energy than it uses?

What measures the amount of energy in a wave?

What kind of mixture is a solution? a colloid?

Einstein's theory of general relativity describes how space and time are connected. What makes this idea a theory? a. Einstein was a known genius b. It was supported by observations and evidence c. Two or more people debated it d.

If a rock weighing 2,200 N is dropped from a height of 15 m, what is its KE just before it hits the ground? Remember, weight is measured in newtons (N), and is equal to mass times gravity. A. 0 J B. 2,224 J C. 147 J D. 33,000 J

A sample of gold has a mass of 30.94 grams and density of 19.32g/cm^3. What volume of space will this sample of gold occupy? D=m/v A. 0.62cm^3 B. 597.76cm^3 C. 1.60cm^3 D. 632.10cm^3

Do the data for the second part of the experiment support or refute the second hypothesis? Be sure to explain your answer

The capacitance of a parallel-plate capacitor does not depend on: area of the plates medium between the plates distance between the plates the material of which the plates are made

Which sequence lists types of material in order from least conductive to most conductive

Spectrum is Latin for which word? A. appearance B. scale C. range D. spread

How is work related to force and displacement?