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?
A. 0.080 m
B. 33.34 m
C. 0.060 m
D. 16.67 m

Imagine that a new planet is discovered with two moons of equal mass: moon a and moon b. the mass of the new planet is greater than the combined mass of its moons. moon a is farther away from the new planet than moon b. what is the planet's gravitational pull on moon a compared to the planet's gravitational pull on moon b? the planet's gravity repels moon a with a greater force than it repels moon b, which is why moon a is farther away. the gravitational pull on moon b is greater than on moon a because moon b is closer to the new planet than moon a. the gravitational pull on moon b is greater than on moon a because moon b is farther away from the new planet than moon a. the gravitational pull on moon a is the same as the gravitational pull on moon b because distance does not affect the planet's gravity.