A current of 12 amps is measured in a circuit with a total resistance of 9.0 ohms. What is the size of the voltage source that supplies this circuit?

What 2 things need to be known about an object in order to determine its kinetic energy?

A wire loop of radius 0.40 m lies so that an external magnetic field of magnitude 0.30 T is perpendicular to the loop. The field reverses its direction, and its magnitude changes to 0.20 T in 2.5 s.

If the spheres are now brought close to each other, but do not touch, describe how the charges will be distributed on their surfaces.

What happens inside an electric generator? A. electrical energy is converted to magnetic energy B. chemical energy is changed to magnetic energy C. mechanical energy is changed to electrical energy D.

The light from many stars can be seen from earth. but there is a time delay between the time the light is emitted from the star and when we see it here on earth. which of the following statements best explains why there is a delay? a.

What is the frequency of 20 mm microwaves? A) 100 MHz B) 400 MHz C) 15 GHz D) 73 GHz E) 98 GHz

A measure of how much pulling, or tension, a material can withstand before breaking is - A. hardness. B. brittleness. C. tensile strength. D. malleability.

How work done against gravity can be expressed?

An electron is acted on by two electric forces, one of 2.7*10-14 N acting upward and a second of 5.8*10-14 N acting to the right. What is the magnitude of the electric field at the electron's location?

A satellite on a Low Earth Orbit is flying with a speed of 7.65 km/s. The vertical component of the Earth's magnetic field is 35.3 μT at the current location of the satellite.