You get 750 j of work out of a machine that you put 6,000 j of work into. What is the efficiency?

An ion source is producing 6Li ions, which have charge + e and mass 9.99 * 10-27 kg. The ions are accelerated by a potential difference of 13 kV and pass horizontally into a region in which there is a uniform vertical magnetic field of magnitude B =

What type of air mass would form over the northern atlantic ocean?

How many neutrons are in calcium

What type of wave is produced when the frequency of a visible light wave is increased

a new high speed rail system uses 6000 horsepower electric cars which get their power from 25 kV overhead wire with resistance 15 ohm. current returns through the track, whose resistance is negligble. what is the maximum range of the train

Is there any science behind unicorns / pegasis?

Rays traveling parallel to the principle axis of a concave mirror will reflect out through the mirrors focus? a. true b. false

Which of the mixtures in figure 1 is a solution?

Light is traveling in air at a speed of 300,000 km/s. Which substance would cause the light to refract the LEAST? A. ruby (speed of light = 170,000 km/s) B. glass (speed of light = 200,000 km/s) C. water (speed of light = 225,000 km/s) D.

What is table salt (NaCl) formed by? The combination of two nonmetals. The splitting apart of a metal and a nonmetal. The combination of a metal and a nonmetal. The combination of two metals.