The primary coil of an ideal transformer has 100 turns and its secondary coil has 400 turns. if the ac voltage applied to the primary coil is 120 v, what voltage is present in its secondary coil?

What is the numeric value of a mole for atoms or molecules?

What is the relationship between mass and weight? A. They are the same concept. B. Weight is mass times the distance. C. Weight is mass times the acceleration of gravity. D. Mass is weight times the acceleration of gravity.

What is Restoring force for large waves is A. Wind, B. Capillary Action, C. Diffusion D. Friction, or E. Gravity

What is the SI unit for momentum? A) kg • m B) kg • m/s C) kg • m squared/s D) kg • m/s squared

Name a situation when potential energy is useful

An airplane started at a distance of 20 km from Chicago and flew directly away from it. 10 minutes later, the airplane was 55 km from Chicago. If dis the distance of the airplane from Chicago, what is Ad? A. 10 km B. 55 km C. 35 km D. 20 km

An alpha particle travels at a velocity of magnitude 550 m/s through a uniform magnetic field of magnitude 0.045T. (An alpha particle has a charge of charge of + 3.2 x 10-19 C and a mass 6.

A woman tries to put lipstick in the car. She has to come to a fast stop, and the lipstick falls to the floor and rolls forward, under the brake pedal. She dies. Why does this happen?

The slope of the line on any speed vs time graph is equal to the objects?

True or False? a globular cluster is a group of older stars that are clustered together.