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Two small metallic spheres, each of mass m = 0.192 g, are suspended as pendulums by light strings of length L as shown in the figure below. The spheres are given the same electric charge of 7.6 nC, and they come to equilibrium when every string is at an angle of = 5.45° with the vertical. How long are the strings?
A child slides down a snow covered slope that makes an angle of 20 degrees with the horizontal. At what angle would the child slide with constant speed
The resistive-wire thermometer is then calibrated against a Hg thermometer. The resistance in terms of the temperature t on the Celsius scale can be optimally fitted by the expression R = R0(1 + alpha t + beta t2) where alpha = 3.80 Times 10-3 degree..
The Bullet Train The Shinkansen, the Japanese"bullet" train, runs at high speed from Tokyo to Nagoya. Riding onthe Shinkansen, you notice that the frequency of a crossing signalchanges markedly as you pass the crossing.
calculate the expectation value of the x position of a particle known to be in a state n 3 of a 1d box of length l.
Alpha-particle scattering experiments using uranium (Z = 92) as the target material show that the alpha-particles experience a pure Coulomb repulsion, Estimate the radius of the uranium nucleus
A copper beaker of mass 0.20 kg contains 0.10 kg of water at 20.0degree C. A block of silver of mass 100 g at 90.0 degree C is added to the beaker of water. The entire system is thermally insulated from the surroundings, (specific heats- copper: 3..
in a helium wind tunnel flow at mach 4.0 passes over a wedge of unknown half-angle aligned symmetrically with the flow.
A cannon is fired from the ground. The cannonball initially travels with a speed of 300 m/s at an angel of 25 degrees with respect to the ground, What is the cannonballs maximum height
A girl makes a microscope with a 3.0 cm focal length objective and a 5.0 cm eyepiece. the microscope tube length is 10 cm. Find expected magnification of this microscope
A town is planning on using the water flowing through a river at a rate of 5.0 x 106 kg/s to carry away heat from a new power plant, What is the maximum power this plant can produce
Two 8.0mm×8.0mm electrodes with a0.10-mm-thick sheet of Mylar between them are attached to a 9.0V battery. find the electric field before and after the Mylar is withdrawn
A magnetic computer disk 7.0 cm in diameter is initially at rest. A small dot is painted on the edge of the disk. The disk accelerates at 590 rad/s2 for 1/2 s, Through how many revolutions has the disk turned
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