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Two stars located 27 light-years from Earth are barely resolved using a reflecting telescope having a mirror of diameter 66 cm. Assuming ? = 600 nm and assuming that the resolution is limited only by diffraction, find the separation between the stars.
Find out how fast a GPS satellite is moving relative to someone on the ground and from that how much slower time runs where it is in orbit relative to someone on the ground.
Two point charges q1 = -3 nC and q2 = -27 nC are at x = 0 and x = 25 cm, respectively, and free to move. What is the sign of the third charge
Planet A and Planet B are in circular orbits around a distant star. Planet A is 4.5 times farther from the star than Planet B. What is the ratio of their speeds
A negatively charged ball having a mass of 10 grams falls from rest in vacuum from a height of 3 meters in a uniform vertical electric field of 104 N/C. find Is the electric field pointing up or down
A fathom is a method for measuring lengths, usually reserved for measuring the depth of water. what is the distance in fathoms
A 4.1-kg block slides down an inclined plane that makes an angle of 29° with the horizontal. Find the coefficient of kinetic friction between the block and plane
A speedboat moves on a lake with initial velocity vector v1,x = 9.69 m/s and v1,y = -2.99 m/s, Find the speedboat's final speed
You want to throw a pebble at a window located 9.6 m above the ground, making sure that the pebble hits the lowest part of the window with a strictly horizontal velocity. What is the velocity with which the pebble hits the window
q1. a chair of weight 125 n lies atop a horizontal floor the floor is not frictionless. you push on the chair with a
You are setting up two standing string waves. You have a length of uniform piano wire that is 6.0m long and has a mass of 0.150kg . You cut this into two lengths, one of 2.6m and the other of 3.4m , and place each length under tension. What should..
The balls have a glancing collision, not a head-on collision, deflecting the second ball by 90° and sending it north at 1.51 m/s. Illustrate what are the speed and direction of the first ball after the collision?
An electron is confined in a 2.00nm box. What are it's three lowest energy levels? What wavelength photon would be emitted during an n=3 to n=1 transition
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