What is the frequency of a wave moving at 1782 m/s if its wavelength is 30.2 m?

In what direction does the medium move relative to the direction of the wave? explain.

While goofing off at the ice skating rink, a student takes off her shoes and places each of them on the ice. her friend, a hockey player, then shoots a hockey puck at each shoe. the first puck immediately comes to rest after it collides with the left shoe. the second puck rebounds after it collides with the right shoe. if each hockey puck has the same incoming speed, which shoe has greater speed after the collision? the right shoe. both shoes have the same speed. the left shoe.

Ln finding the density of liquid why is the method of using a density bottle more accurate than the one of using a measuring cylinder