Asonar wave is reflected from the ocean floor. for which angles of incidence do the wave’s angle of reflection equal its angle of incidence?

Four friends, a, b, c, and d are standing varying distances away from a speaker which is producing sound waves.

Two positive charges are equal. which has more electric potential energy?

Ascientist plants two rows of corn for experimentation.she put fertilizer on row 1 but does not put fertilizer on row 2 both rows receive the same amount of water and light intensity she checks the growth of the corn over 5 months what is the constant in this experiment