Frank shined a beam of light at the surface of a mirror. A piece of paper above the mirror was lit up. what cause the light of shine on the paper above the mirror?

A) the light was refracted
B) the light was reflected
C) the light was amplified
D) the light was diffracted

Spend time observing or thinking about events that involve matter and energy. which events can you explain? which events can’t you explain?

The magnetic field inside a superconducting solenoid is 4.50 t. the solenoid has an inner diameter of 6.20 cm and a length of 26.0 cm. determine (a) the magnetic energy density in the field and (b) the energy stored in the magnetic field within the solenoid.

At 20∘c, the hole in an aluminum ring is 2.800 cm in diameter. you need to slip this ring over a steel shaft that has a room-temperature diameter of 2.804 cm . 1. to what common temperature should the ring and the shaft be heated so that the ring will just fit onto the shaft? coefficients of linear thermal expansion of steel and aluminum are 12×10−6 k−1 and23×10−6 k−1 respectively.