. What is the approximate resolution of a circular microwave antenna having an aperture of 1 m and orbiting at an altitude of 800 km? Use a wavelength of 5 cm. (Resolution here means the diffraction-limited resolution: the diameter of the first zero crossing of the illumination pattern).

Aball with a mass of 275 g is dropped from rest, hits the floor and rebounds upward. if the ball hits the floor with a speed of 2.40 m/s and rebounds with a speed of 1.70 m/s, determine the following. (a) magnitude of the change in the ball's momentum (let up be in the positive direction.)