List two examples of ways to increase efficiency in a machine.

Electromagnetic waves can transfer energy without which of the following? A. Medium. B. Electric field. C. Magnetic field. D. Change in either a magnetic or an electric field.

A circular loop of wire of cross-sectional area 0.12 m2 consists of 200 turns, each carrying 0.50 A. It is placed in a magnetic field of 0.050 T oriented at 30° to the plane of the loop. What torque acts on the loop?

Which heat transfer process is important in the transfer of energy from the Sun to Earth?

How many kilometers are in 1.40 miles

Two charged spheres are 16 cm apart. If the spheres are moved closer to each other so that they are 8 cm apart, how will the force between them change?

What holds the atoms together in a covalent bond

The sun is the centermost star of our solar system. a. True b. False

When an electron moves from a lower to a higher energy level

Which of the following is all matter made of? A. Hot particles B. Cold particles C. Constantly moving particles D. Nonmoving particles

Which of the following has longest wavelength, a) blue light b) red light c) x-rays d) gamma rays?