Why do metals conduct electricity

The current in a lamp is 0.5 ampere when it is plugged into a standard wall outlet. What is the resistance of the lamp when it is plugged into a standard wall outlet?

To get information into its carrier wave, every radio station has to amplify the carrier wave.

Which of the following makes gravity increase? A. The mass of forming objects increases. B. The mass of forming objects decreases. C. The spherical shape of planets provides the momentum needed to increase gravity. D.

A train takes 2h to reach station B from station A and 3h to return back to A. The distance between the station is 200km, then its average speed would be

Define acceleration to show its scientific meaning

A ball is thrown upward with an initial velocity of 48 ft/sec from a height 640ft. It's height h, in feet, after t seconds is given by h (t) = - 16t^2 + 48t+640.

You slide a slab of dielectric between the plates of a parallel-plate capacitor. As you do this, the potential difference between the plates remains constant.

Heat transfer between two substances that are in contact is called

What is the principles of electric motor

A tow truck has a weight of 10,350 N. What is the mass of the tow truck?