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Out of a gamma, beta, and an alpha source, what would be the best way to minimize radiation exposure given the following?
-Which one would you place in your mouth?
-Which one would you place in your hand?
-Which one would you place in your pocket?
A horizontal 790-N merry-go-round of radius 1.20 m is started from rest by a constant horizontal force of 45 N, Find the kinetic energy of the merry-go-round after 5.0 s
A hiker moves from base camp a distance of 1250 m due East, then another 845 m in a direction 60.0 degrees North of East. What is the final displacement and direction from base camp
An object is placed between two plane mirrors arranged at right angles to each other at a distance d1 from the surface of one mirror, how many images are formed
A 0.410 kg pendulum bob passes through the lowest part of its path at a speed of 3.13 m/s. What is the tension in the pendulum cable at this point if the pendulum is 76.2 cm long.
a u.s $20 gold piece has a mass of 33.44g and displaces 1.935cm^3 of water. if the coin is known to consist of only gold, what is the percentage of gold composition by mass of the coin
Assume that NASA fails in its attempt to put a communications satellite into geosynchronous orbit. If the orbit is too big, what apparent motion will the satellite have to an observer standing on the rotating Earth?
Two polarizers are oriented at 42o to each other and apolarized light is incident on them. If only 16 percent of thelight gets through both of them, what is the angle between theinitial polarization direction of the incident light and the firstpolari..
A potter's wheel having a radius 0.53 m and a moment of inertia of 14.9 kg · m2 is rotating freely at 46 rev/min. Find the effective coefficient of kinetic friction between the wheel and the wet rag
An electron of mass 9.11×10?31 leaves one end of a TV picture tube with zero initial speed and travels in a straight line to the accelerating grid, Find the Time to reach the grid
A simple pendulum is made from a 0.63 mlong string and a small ball attached to its free end. The ball is pulled to one side through a small angle and then released from rest. After the ball is released, how much time elapses before itattains its ..
A fountain shoots a jet of water 10 m into the air. The fountainhas a round nozzle of diameter 1.84 cm at ground level, fed by a pump located 6 m belowground through a round pipe of diameter 5.19 cm.
A 180 Nsphere 0.20 m in radius rolls, without slipping 6.0 m down a rampthat is inclined at 34° with thehorizontal. What is the angular speed of the sphere
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