1. Suppose that a log is burning in a fireplace. The log contains chemical energy. Light, heat, and some sound are given off as the log burns. How does this demonstrate the
law of conservation of energy?
A.
B.
The total amount of energy in the universe changes.
Energy is destroyed.
Energy is created.
Energy is converted from one form to another.
C.
D.

Abike rider starts from rest and accelerates 28.0 meters down a slope in 5.00 seconds. what is her acceleration? select one: a. 3.21 m/sec2 b. 1.75 m/sec2 c. 9.80 m/sec2 d. 2.24 m/sec2

The nuclear potential that binds protons and neutrons in the nucleus of an atom is often approximated by a square well. imagine a proton conned in an innite square well of length 105 nm, a typical nuclear diameter. calculate the wavelength and energy associated with the photon that is emitted when the proton undergoes a transition from the rst excited state (n 2) to the ground state (n 1). in what region of the electromagnetic spectrum does this wavelength belong?

Newtons view of arrangement of the universe. don't copy from anywhere.