With what speed must you approach a source of sound to observe a 25% change in frequency?

A car travels at 40km/hr for 2 hours and at 55 km/hr for 2 hours. How far has the car traveled? What is its average velocity?

Inside the gym a mile is 19.7 laps or Laps around the gym

Which electromagnetic wave type has the largest wavelength?

A ball hits a wall horizontally at 6m/s and rebounces at 4.4m/s the ball is in contact with wall for 0.04 sec. what is the acceleration.

Imagine being somewhere in the universe free from all gravitational and frictional influences. While you are there, you throw a baseball. That ball will: A. Move forward, and gradually stop moving. B. The ball will not move at all. C.

A 7700-kg box car traveling at 14 m/s strikes a second car at rest. The two stick together and move off with a speed of 5.0 m/s. What is the mass of the second car?

What will happen if there is a change in a magnetic field?

Question 2 10 pts The voltage in a particular circuit is 10.0 V. The current in the circuit is 20 A. What is the resistance? A. 2.0 B. 30 C. 200 D. 0.5

Where in the motion is the magnitude of the net force on the object a maximum? where in the motion is the speed a maximum?

Which movies are longer than 2 hours?