A copper wire has a diameter of 1.02mm and carries

a constant current of 1.67A. If the density of

free electrons in copper is 8.5 x10 to the power 28 per meter cube. calculate

the current density and drift velocity of the electrons

Which statements belong to Dalton's atomic theory? Select all that apply. Atoms have a massive, positively charged center. Atoms cannot be created or destroyed. Atoms cannot be broken down into smaller pieces. All atoms of an element are identical.

Express 68 rations in dekarations

If two stars are the same size but different temperature which star is more luminous

a Ferrari with an initial velocity of 10 m/s, comes to a complete stop in 5 seconds, what will its acceleration be?

Part A By what distance do two objects carrying 1.0 C of charge each have to be separated before the electric force exerted on each object is 4.0 N? Express your answer with the appropriate units.

The water in a lake is at 5 °C. A diver measures the pressure of the water at two different depths in the lake. He repeats the measurements on a different day when the water is at 15°C.

A hot spot is an area where material from deep within the mantle rises and melts through the crust above it. True or False

Which suspect is one who wrote the suicide note? Question 1 options: George Roberts Karen Roberts Mary Roberts John Huddleston

What happens when an atom is exposed to an energy source such as electricity? The electrons may jump to a higher energy level. The electrons move closer to the nucleus. The electrons may move to a lower energy level.

A coin completes 18 spins in 12 seconds. The centripetal acceleration of the edge of the coin is 2.2 m/s2. The radius of the coin is m.