A machine 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?

At what speed does the radio wave travel?

When two balanced forces cancel each other, they are in?

You can filter the particles out of a suspensions. b colloids. c solutions. d all of the above

Anything that has mass and takes up space is called: a. heavy b. matter c. proportion d. structure

If dye x has a molar absorptivity, ε = 4.50 x 104 cm-1 m-1, at a certain wavelength, what concentration of the dye, in a 1.00 cm cuvette cell will produce an absorbance of 0.417?

A conservative force acts on a particle. We can conclude: A. The work done by the force on the particle depends only on initial and final position. B. The force must be constant. C. The particle cannot change direction. D.

Which action is caused by gravity? a frost wedging b aeolian bands c mass wasting d glaciation

A light beam is directed parallel to the axis of a hollow cylindrical tube. When the tube contains only air, the light takes 8.72 ns to travel the length of the tube, but when the tube is filled with a transparent jelly, the light takes 1.

Neon, helium, methane, krypton, xenon, hydrogen, and ozone make up & what of the atmosphere

The element in an incandescent light bulb that releases light energy is