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Q. Which of the following must be true if we are to infer (calculate) a star's luminosity directly from the inverse square law for light?
We have measured the star's apparent brightness.We have measured the star's distance.The star must be a member of a binary system.No interstellar gas or dust absorbs or scatters light between us and the star.We have measured the star's spectral type.
What force does a 55 kg passenger exert on the seat when she is at the top of the Ferris wheel.
A 21.5 g bullet strikes a 0.650 kg block attached to a fixed horizontal spring whose spring stiffness constant is 7.30 x 10^3 N/m and sets it into vibration with an amplitude of 21.5 cm. What was the speed of bullet before impact if the bullet and bl..
A charge of -2.20 micro coulombs is located at (3.00m, 4.50m), and a charge of +3.60 micro coulombs is located at (-2.8m, 0m).
What range is appropriate
A novice skier, starting from rest, slides down a frictionless 41.0 incline whose vertical height is 230.How fast is she going when she reaches the bottom.
How much time is necessary for the torso to come to rest
What is current flowing through the collider
A man weighing 730 and a woman weighing 410 have the same momentum. What is the ratio of the man's kinetic energy to that of the woman.
What happens in the table as to the potential energies
Two astronauts, each having a mass M, are linked by a rope of length d having negligible mass. They are isolated in space, orbiting their center of mass at speeds v.
A little cat, Bella, walks in a straight line, which we shall call the x axis, with positive direction to the right. As an observant scientist, you make measurements of her motion and construct a graph of the little feline's velocity as a function..
What is the horizontal component of velocity
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