What causes a solar eclipse? select all that apply.

a.) the shadow of earth

b.) the shadow of the moon

c.) the rotation of the moon around its axis

d.) the moon passing between the sun and earth

e.) earth passing between the sun and the moon.

How does the amount of energy required to hold each proton and neutron in the nucleus compare to the energy released when they are removed?

Astudent is performing an experiment comparing sound and light waves. the student gathers the following data. what conclusion does the student most likely make based on this data? light waves always travel the same speed; however, the speed of sound is determined by the medium that it travels through. all sound waves always have the same energy, so the temperature of the medium does not affect wave speed. light needs to vibrate particles, so it travels fastest in tightly packed solids, while sound does not need a medium, so it travels fastest in a gas. tightly packed particles in solids slow down the light waves; however, sound waves make particles bounce into each other, so they travel faster in solids.

When the displacement of a mass on a spring is 12a the half of the amplitude, what fraction of the mechanical energy is kinetic energy? at what displacement, as a fraction of a, is the mechanical energy half kinetic and half potential?