Find the separation of two points on the moon’s surface that can just be resolved by the 200 in. (= 5.1 m) telescope at mount palomar, assuming that this separation is determined by diffraction effects. the distance from earth to the moon is
3.8×105km
. assume a wavelength of 550 nm for the light.

Work out sian speed for the first 30 minutes of her journey. give your answer in km/h.

At a certain instant after jumping from the airplane a, a skydiver b is in the position shown and has reached a terminal (constant) speed vb = 52 m/s. the airplane has the same constant speed va = 52 m/s, and after a period of level flight is just beginning to follow the circular path shown of radius ρa = 2330 m. (a) determine the velocity and acceleration of the airplane relative to the skydiver. (b) determine the time rate of change of the speed vr of the airplane and the radius of curvature ρr of its path, both as observed by the nonrotating skydiver.

You add 800 ml of water at 20c to 800 ml of water at 80c what is the most likely final temperature of the mixture ? a. 100c b. 60c c. 25 c d.50c