An object 5 millimeters high is located 15 millimeters in front of a plane mirror. how far from the mirror is the image located?
a) 5 millimeters
b) 7.5 millimeters
c) 15 millimeters
d) 30 millimeters

How would a small bar magnet be oriented when placed at position x?

While standing outdoors one evening, you are exposed to the following four types of electromagnetic radiation: yellow light from a sodium street lamp, radio waves from an am radio station, radio waves from an fm radio station, and microwaves from an antenna of a communications system. rank these type of waves in terms of increasing photon energy.

Estimate of the number of stars in our galaxy