What is the tension in the cables
A 16 kg loudspeaker is suspended 2.5 m below the ceiling by two cables that are each 60 degrees from vertical. What is the tension in the cables?
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A staging that weighs 430 N supports two painters, one 110 N and the other 460 N. The reading in the left scale is Ft = 700 N. What is the reading Fr, in the right hand scale?
A thin radioactive source placed in an ionization chamber emits 10^6 alpha particles per second with energy 3.81 MeV. the particles are completely stopped in the gas, for which W=36 ev ip^-1. Calculate a. the average number of ion pairs produced p
What is the speed of the block immediately after the bullet stops relative to it?
A 0.26 kg rock is thrown vertically upward from the top of a cliff that is 32 m high. When it hits the ground at the base of the cliff, the rock has a speed of 29 m/s. Assuming that air resistance can be ignored, find A) the initial speed of the
For the motion from the initial release until the piece of wood comes to rest, what is the total amount of work done by friction?
A krypton laser produces a cylindrical red laser beam 2.0mm in diameter with 2.0W of power. What is the light intensity on a wall 0.80m away from the laser?
A submarine is 305 m horizontally out from the shore and 117 m beneath the surface of the water. A laser beam is sent from the submarine so that it strikes the surface of the water at a point 219 m m from the shore. If the beam strikes the top of
Two particles of different mass start from rest. The same net force acts on both of them as they move over equal distances. How do their final kinetic energies compare?
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