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A particular radioactive source produces 150 mrad of 2 MeV gamma raysper hour at a distance of 1.0 m.
(a) How long could a person stand at thisdistance before accumulating an intolerable dose of 1 rem?
h
(b) Assuming the gamma radiation is emitted uniformly in alldirections, at what distance would a person receive a dose of15 mrad/h from this source?
m
A helium-neon laser beam has a wavelength in air of 633 nm. Ittakes 1.43 ns for the light to travelthrough 25.0 cmof an unknown liquid. What is the wavelength of the laser beam in the liquid
The position of a particle is given by the expression x = (3.00 m) cos(4.00?t + ?/4), where x is in meters and t is in seconds. Determine the frequency and period of the motion
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You keep your coffee in a sealable thermal mug which has thermal conductivity k-0.036 W/m k. how long (in minutes) will it take the coffee to cool down
ashlee pulls andy on a skateboard. ashlee pulls with a force of 52.2n to get it moving and 42.0n to keep it at a
A 1.8m -long, 600g rope pulls a 2.0kg block of ice across a horizontal, frictionless surface. The block accelerates at 4.0m/s2, How much force pulls forward on the block of ice
Water with a mass of 0.500 at 15.0 is mixed with 0.800 of water at 35.0. What is the final temperature of the mixture? Express your answer in degrees Celsius. Suppose that in an insulated container, 0.100 of water at 20.0 is mixed with 1.500 of ic..
A major leaguer hits a baseball so that it leaves the bat at a speed of 28.0m/s and at an angle of 34.6? above the horizontal. What is the direction of the baseball's velocity when it returns to the level at which it left the bat
A square wire loop 11.0 cm on each side carries a clockwise current of 16.0 A. Find the direction of this magnetic field
A car is moving with constant acceleration along a straight road. Determine how the velocity varies for positive acceleration if the car is initially moving to the right with a speed of 10.0 m/s
underwater remotely operated vehicles are used to check underwater pipelines and structures such as gas platforms. they
A stone is dropped into a deep canyon and is heard tostrike the bottom 10.2 seconds after it is released. How deep is the canyon
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