Water is more elastic than air. why?

The graph describes the motion of an object. the object moves with from a to b. it from b to c. it moves with from c to d.

Which of the following is the phase that results when the moon is on the opposite side of the earth from the sun? a. quarter moon b. crescent moon c. new moon d. full moon

Afrequency generator sends a 550 hz sound wave through both water and ice. what is the difference in wavelength between the wave produced in ice and the wave produced in water?