Part A A physics student solving a physics problem has obtained the following four equations that describe the physics of a system of
masses connected by a string
(1) mg 3m
(2) -mg cos 0+T - mai
(3) a-09
(4) mag-T-mga
where g 9.80 meter/second and 0 -60 are knowns, and my my, as, as, and T are unknowns. The problem requires
the student to evaluate as Which are the unknowns that the student would like to eliminare from the equations?

What happens when chlorine reacts with bromine? a. electrons move from the chlorine atoms to the bromine atoms. b. electrons move from the bromine atoms to the chlorine atoms. c. electrons are shared between the chlorine atoms and the bromine atoms. d. electrons become delocalized among the atoms.

Afisherman notices that his boat is moving up and down periodically without any horizontal motion, owing to waves on the surface of the water. it takes a time of 2.20 s for the boat to travel from its highest point to its lowest, a total distance of 0.670 m . the fisherman sees that the wave crests are spaced a horizontal distance of 5.80 m apart. (a) how much is the wavelength? (b) find the period of the wave. (c) how fast are the waves traveling? (d) what is the amplitude a of each wave?

What conclusion can be made based on the temperature of soil when the light hits the soil at 0°, 45°, and 90° angles in section 2 of the experiment? did your results support your hypothesis? why or why not?