Q. Two cars move toward each other at the same speed. One car emits a frequency of 400.0 Hz which the other car hears at 500.0 Hz. How fast is each car going?
Q. A 0.250 kg block on a vertical spring with a spring constant of 500x 10^ N/m is pushed downward, compressing the spring 0.100m. when released, the block leaves the spring and travels upward vertically. how high does it rise above the point of release.