A150 w driveway light produces 9.3 × 104
j of light energy
over a 4.0 h period. if the light uses 2.06 × 106
j of energy in
the 4.0 h, then what is its efficiency? show all your work.

What happens to an isotope during radioactive decay?

1which body contains the majority of the mass in the solar system earth jupiter the moon the sun 2 what keeps the objects in the solar system such as planets orbiting around the sun the force of gravity the galaxy exerts on all objects within it including the solar system the great distance between the sun and the planets the sun's nuclear fusion which acts on each object the gravitational force between the sun and each object in the solar system

Two waves maximally constructively interfere at a point in space. among the options below, select the possible value of their phase difference at that point in space.a. zerob. πc. π/2d. not determinable by the information provided