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About 12% of your body mass is carbon; some of this is radioactive 14C, a beta-emitter. If you absorb 100% of the 49 keV energy of each 14C decay, what dose equivalent in Sv do you receive each year from the 14C in your body?
a coal-fired electric power plant has an overall efficiency of 35 and an output of 1496 megawatts. how many terajoules
A solid piece of lead has a mass of 28.44 g and a volume of 2.55 cm3. From these data, calculate the density of lead in SI units (kilograms per cubic meter)
A car with good tires on a dry road can decelerate at about 5.0 m/s2 when braking. Assume the car is initially traveling at 55 mi/h. Determine what is the stopping distance
q. consider an infinite wire with radius r that carries a current ia compute b r for r lt rconsider a large parallel
A 220 g top spinning at 14 rev/s makes an angle of 30° to the vertical and precesses at a rate of 1 rev per 8.0 s. what is the moment of inertia of the top
A bimetallic strip is made out of two strips of metal bonded together. Each strip is 20.0 cm long and 1.00 mm thick. What is the inner radius of curvature of the composite strip
A tennis ball is thrown toward a vertical wall with a speed of 22.0 m/s at the angle of 40.0° above the horizontal. The horizontal distance between the wall and the point where the tennis ball is released is 28.0 m.
The balloon is filled with helium at a density of 0.181 kg/m3. At this density the balloon is spherical with a radius of 0.400 m. If the filled balloon is fastened to a vertical line,
A large grinding wheel in the shape of a solid cylinder of radius 0.330 m is free to rotate on a frictionless, vertical axle. What is the mass of the wheel
two equally charged particles are held 3.0 10-3 m apart and then released from rest. the initial acceleration of the
The speed of a bobsled is increasing because it has an accelerationof 2.4 m/s2. At a given instant in time, the forcesresisting the motion, including kinetic friction and airresistance, total 450 N. The combined mass of the bobsled and it sriders ..
A 1.5 x 103 kg car is pulled horizontally by a tow truck. The tension in the tow rope is 2.1 x 103 N, and a 1.8 x 102 N friction force opposes the motion. If the car starts from rest, what is its speed after 5.0 s
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