Ultrasound refers to sound waves that have frequencies that are higher than humans can hear. Information from ultrasound waves that are reflected off objects can be used to make images. Dr. Nolas is using an ultrasound machine to make images of objects that are in a liquid. The machine produces a wave that moves through the liquid at a speed of 1,500 m/s and has a frequency of 25,000 Hz. What is the wavelength of the wave moving through the liquid?

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.