A 1.62 kg baseball, moving west at a speed of.80 m/s, hits a .316 kg stationary milk bottle at a game at the State Fair. Immediately after the collision, the milk bottle is
moving away at 1.73 m/s. What is the post-collision velocity of the baseball?

Light from a sodium lamp passes through a diffraction grating that has 1000 slits per millimeter. the interference pattern is viewed on a screen 1.000 m behind the grating. the first (m = 1) two bright yellow fringes that are visible are 0.7288 m and 0.7300 m from the central maximum. what are the wavelengths of these two fringes?

While you are driving in the lane next to the curb on a multi-lane road the car on your left suddenly moves toward you lane. they are about toy crash into your front fender. you

What sort of waves exhibit the doppler effect?