A voltage of 21.0V across the terminals of a device produces a current of 3.00 mA through the device. What is the resistance of the device?

You shoot a beam of electrons through a double slit to make an interference pattern. after noting the properties of the pattern, you then double the speed of the electrons. what effect would this have?

Two circular loops lie adjacent to each other on a tabletop. One is connected to a source that supplies an increasing current; the other is a simple closed ring.

A rock rolls from the top of the hill to the bottom. The total energy of the rock at top isn't the same as the sum of its energy at the bottom which statement best explains this situation

Does gravity increase or decrease with greater mass?

How will a lens with a long focal length bend light? a. a lot b. a little c. not at all d. It depends of the height of the lens.

The voltage across the primary winding is 350,000 V, and the voltage across the secondary winding is 17,500 V. If the secondary winding has 600 coils, how many coils are in the primary winding? 30 583 12000 332500

A 200 watt t. v. is used for 20 hours in a week. If it is used for four weeks then what is cost of electricity if rate is 5rs/kwh

In an experiment, the control is never changed by the scientist not important to the scientist not recorded by the scientist changed by the scientist

When you catch a baseball, what kind of work do you do, negative or positive? by catching the ball, what do you change? what energy does it gain or lose?

All describe work except A) a team of dogs dragging a sled B) a jokey sitting on a horse C) a bowler lifting a bowling ball