An object of the same mass has three different weights at different times. Which statement is possible?
•
The object gains matter and then loses it.
The object started on Earth, was transported to space, and was deposited on the moon
The object started at the bottom of a hill, then moved to the top of the hill, and then moved back down to the bottom of the
hill
The object changes shape, which changes its weight.

Asun-sized star will spend most of its lifetime as a: white dwarf red giant protostar main-sequence star

The place you get your hair cut has two nearly parallel mirrors 6.00 m apart. as you sit in the chair, your head is 2.00 m from the nearer mirror. looking toward this mirror, you first see your face and then, farther away, the back of your head. (the mirrors need to be slightly nonparallel for you to be able to see the back of your head, but you can treat them as parallel in this problem.) how far away does the back of your head appear to be?

What are the applications of electromagnetic waves