While sitting in a boat, a fisherman observes that two complete waves pass by his position every 4 seconds. What is the period of these waves?
0.5 s
25
45
85

Aboxcar traveling at 12 m/s approaches a string of 5 identical boxcars sitting stationary on the track. the moving boxcar collides and links with the stationary cars and they all move off together along the track. what is the final speed of the cars immediately after the collision? (you may take the mass of each boxcar to be 18,537 kg.)

Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz.

Write a full page that sumerizes thermodynamics it’s from the website visionlearnig