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Determine the temperature at which the resistance ofatungstenwire will bethree timesits value at 20°C. Assume its coefficient of resistivity remains constant.
a spring is hung from the ceiling. a 0.45kg block is then attached to the free end of the spring. find the angular frequency of the block's vibrations
An isotope of phosphorus called P-32 is radioactive. It decays with half life of 14.3 days with the emission of beta particle. A 1.0 m?Ci source of P-32 is implanted in a tumor where it would deliver radiation dose of 28.6 Gy.
A hand grenade is thrown with a speed of v0 30 m/s, and a 60 degree angle with x-axis, just prior to exploding. It breaks into two pieces of equal mass after the explosion. One piece has a final velocity of 40 m/s along x. Find the velocity of t..
if there were two kinds of electrons, you could put 4, not just 2, in a given state. what would be the atomic number of the third largest inert gas in such a world
The immediate environment of a reactor contains a large flux of 10 MeV gamma rays. Resolve the thickness of lead required to reduce the intensity by a factor of 1012. Assume the mass absorption coefficient of Pb for 10 MeV photons is m/r = 0.06 cm..
A French submarine and a U.S. submarine move toward each other during maneuvers in motionless water in the North Atlantic, What are the speeds of the U.S. and the French subs
Two hockey players are traveling at velocities of v1 = 11 m/s and v2 = -20 m/s when they undergo a head-on collision. What is the mass of the other player
A 6 kg mass is attached to a spring with a spring constant k=20 N/m. The spring is stretched 50 cm and released at t=0s. What is the period of the mass-spring system
A horizontal spring-mass system has low friction, spring stiffness 155 N/m, and mass 0.6 kg. What is the maximum stretch during the motion
A skier of mass m glides down a hill of slope ? at constant speed. If she travels a distance d down the hill, what is the work done by friction
A 10-uF, a 20-uF, and a 50-uF capacitor are connected in series across a 160 volt source. What value of charge is on each capcitor
Two closely spaced circular disks form a parallel-plate capacitor. Transferring1.3109 electrons from one disk to the other, What are the diameters of the disks
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