A current of 9 A flows through an electric device with a resistance of 43 ohms. What must be the applied voltage in this particular circuit?

A. 387 V

B. 4.8 A

C. 387 A

D. 4.8 V

The coefficient of linear expansion of steel is 12 * 10-6 K-1. What is the change in length of a 25-m steel bridge span when it undergoes a temperature change of 40 K from winter to Summer?

Where in an atom would you expect to find electrons? protons? neutrons?

Two rocks are moving through empty space in a straight line at the same speed. One has a mass of 10 kg, the other has a mass of 50 kg. Which statement about the rocks is true? A. Both will be stopped by the same amount of force acting against them.

3 examples of physical change

Which type of nuclear waste can be disposed of in a landfill? low-level transuranic mid-grade high-level

The period T of a simple pendulum depends on the length L of the pendulum and the acceleration of gravity g (dimensions L/T^2). (a) Find a simple combination of L and g that has the dimensions of time.

What is an example of the theory that the best adapted organisms for an environment are the ones most likely to survive

What does not affect the apparent brightness of a star?

What happens when Dr. Hewitt places a current - carrying wire between the poles of the magnet for the first time?

The football player running toward the goal line has A. Potential energy B. Chemical energy C. Kinetic energy D. Elastic potential energy