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

Electric potential difference is also known as

Particle A is at rest, and particle B collides head-on with it. The collision is completely inelastic, so the two particles stick together after the collision and move off with a common velocity.

Ian has a mass of 58.0 kilograms. What is his weight? Include the correct units with your answer.

A technician wearing a metal watch with a resistance of 0.0200 Ω that encloses an area of 0.00500 m2. The technician is in the presence of a uniform magnetic field with a magnitude of 4.40 T directed perpendicular to the plane of the watch.

Explain in detail what specific factors affect the momentum of a bicycle going down hill.

A 1,120 kg car is travelling with a speed of 40 m/s. Find its energy.

3. Calculate the amount of current through a 45-watt light bulb that is connected to a 120-volt circuit in your home.

Are oranges called oranges because oranges are orange, or is orange called orange because oranges are orange?

An object at rest has no net force acting on it. a. True b. False

A baseball has mass 0.145 kg. (a) If the velocity of a pitched ball has a magnitude of and the batted ball's velocity is in the opposite direction, find the magnitude of the change in momentum of the ball and of the impulse applied to it by the bat.