Q. Two radio-frequency point sources separated by 1.50m are radiating in phase with λ = 0.30m. A detector moves in a circular path around the two sources in the plane containing them. Without written calculation, find how many maxima it detects.
Q. A 0.200 kg block is placed on a vertical spring (k = 5.80x 10^3 N/m) and pushed downward, compressing the spring 0.100 m. As the block is released, it leaves the spring and continues to travel upward. What height above the point of release will block reach if air resistance is negligible?