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A particular radioactive source produces 150 m rads of 2.5 MeV gamma rays per hour at a distance of 1 m.
1) How long could a person stand at this distance before accumulating an intolerable dose of 1 rem
2) Assuming the gamma radiation is emitted isotropic ally, at what distance would a person receive 15 m rads/hr from this source?
During a physics experiment, helium gas is cooled to a temperature of 19.0K at a pressure of 6.00×10?2atm. find the rms speed of the atoms
The threshold of hearing in air corresponds to a frequency of 1000 Hz and an intensity of about 9.5 x 10?13 W/m^2 When someone under water hears such sound, what is the corresponding maximum displacement
Consider a charged metallic spherical shell of radius a=1.75 cm.The potential at a distance of r=6.0 cm from the center of theshell is measured to be 1.5kV. What is the charge on theshell? Calculate the potential on the surface of theshell.
a loaded penguin sled weighing 90 n rests on a plane inclined at 20deg to the horizontal. between the sled and the
A simple pendulum has a mass of 0.650 kg and a length of 2.00 m. It is displaced through and angle of 7.0 degrees and then released. what is the maximum restoring force using harmonic
The negative muon is a subatomic particle with the same charge as the electron but a mass that is about 207 times greater: m(u)~ 207 m (electron). Determine the radius and energy of the first Bohr orbit in a muonic hydrogen atom
A pump of 2 kW output power discharges water from a cellar into astreet that is 6m above. At what rate (in liters per second) is thecellar emptied
Pretend you foolishly play your keyboard instrument under water where the speed of sound is 1500.0m/s
A person starts from rest at the top of a large, frictionless, spherical surface, and slides into the water below, At what angle does the person leave the surface
A gold prospector finds a solid rock that is composed solely of quartz and gold. The mass and volume of the rock are, Find the mass of the gold in the rock
Three astronauts, propelled by jet backpacks, push and guide a 115 kg asteroid toward the processing dock, exerting the forces, with F1 = 34 N, F2 = 57 N, F3 = 41 N, θ1 = 30°, and θ3 = 60°
A 50kg pullvolter running at 10 m/s vults over the bar. Her speed when she is above the bar is 1 m/s. estimate her altitude as she crosses the bar
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