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You are a health physicist and you find an unknown contaminant that proves to be a pure beta emitter. To try to identify the contaminant, you attempt to determine the maximum energy of the beta rays. You use a GM tube with a thin (0.1 mm, ?=2.7 g/cm^3) end window. You find that 1.74 mm stops all of the beta particles. The distance between the sample and the counter is 2 cm.
a. What is the energy of the beta particle?
b. What do you think the contaminant is?
When the centrifuge reaches an angular speed of 2.5 rad/s, the trainee experiences a total acceleration equal to 4.8 times the acceleration due to gravity. Explain how long is the arm of the centrifuge?
A railroad car of mass 2.6 104 kg moving at 5.00 m/s collides and couples with two coupled railroad cars, How much kinetic energy is lost in the collision
Two equal charges of 3.00 mC lie along the x-axis: one is at the origin, and the other is 2.0m from the origin. Discover the magnitude and direction of the electric field at a point on they-axis .25m from the origin.
Astronomers discover a binary star system that has a period of 96.0days. How far apart are the two stars in m
The graph shows the net external force component Fcos along the displacement as a function ofthe magnitude s of the displacement. The graph applies toa 59.4-kg ice skater.
Calculate the volume of the cylinder geometrically. Calculate the density of water using the data for its volume and mass
A proton of mass m is accelerated up to a kinetic energy K and then collides with a stationary proton at rest. All that is left after the collision is a new particle of mass M.
A golfer drives a 0.046kg golf ball from an elevated tee, giving the ball an initial horizontal velocity of 45 m/s. (a) what is the magnitude of the average force exerted by the club on the ball if the contact time for the golf club on the ball du..
an interesting but oversimplified model of an atom pictures an electron in orbit around a proton. suppose this electron
A child is in danger of drowning in the Merimac river. The Merimac river has a current of 3.1 km/hr to the east. The child is 0.6 km from the shore and 2.5 km upstream from the dock. A rescue boat with speed 24.8 km/hr (with respect to the water) ..
a swimming pool measures 10 meters wide by 50 meters long by 4 meters deep. what is the water pressure at this point
A spherical water drop 2.9 ?m in diameter is suspended in calm air due to a downward-directed atmospheric electric field of magnitude E = 5240 N/C. How many excess electrons does it have
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