Which of the following statements is false? a) electromagnetic radiation often behaves like a wave. b) the atomic spectrum of helium is different from the atomic spectrum of neon. c) light that is high in energy has a high frequency. d) an atomic spectrum is an element's fingerprint. e) an atom emits electromagnetic radiation when an electron moves from a lower energy level to a higher energy level.

An architect plans to use solar energy to heat the next house he designs. what principle of absorption and infrared energy can be applied to the design of the new house? how could she apply to those principals?

Glass has a hardness that is in the middle of the hardness scale. what is the hardness of glass?

During the apollo moon missions, astronauts were concerned about the effects of newton's third law of motion when: o a. they ejected waste water, because they were concerned that it would push them off course. o b. they reentered earth's atmosphere, because they were carrying heavy moon rocks. o c. they took off from earth, because a large force was required to generate large acceleration. o d. they detected incoming space debris, because the inertia of the debris could damage their ship.