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For alpha particles of energy 7.68 MeV scattered from a platinum foil two microns thick, find: (a) the collision diameter, (b) the differential scattering cross section, and (c) the fractional number of particles scattered through angles of 90 degrees or more.
An electric water heater operates at 66 A and 16 kilowatts, Calculate N (the total number of resistors) and the cost of manufacturing the heating element if in a pack of 100 resistors cost $0.50
A 423 Hz sound wave travels through a substance. What is the speed of sound in the substance
Two small metal spheres with masses 2.0 {rm g} and 4.0 {rm g} are tied together by a 5.3-{rm cm}-long massless string and are at rest on a frictionless surface. Each is charged to +2.3 mu C. What is the energy.
q1. three equal point charges each with a charge of 1.90 mu c are placed at the corners of an equilateral triangle
If we assume the ice is perfectly slick (that is, no friction between the crewman and the ice once he slips and falls down), At what speed will the crewman hit the bottom of the ravine
A point charge at the origin of a coordinate system produces the electric field E = (36000 N/C)x on the x axis at the location x = -0.50 m.
The sun is 30 degrees above the horizon. It makes a 48 meter long shadow of a tall tree. How high is the tree
A soccer ball leaves the foot of a player with an intitial velocity of 22 m/s at an angle of 30 degrees above the positive x-axis
About 27% of the body of a person floating in the Dead Sea will be above the water line. find the density of the water in the Dead Sea
A steel wire of length 2.02 with circular cross section must stretch no more than 0.210 when a tensile (stretching) force of 380 is applied to each end of the wire. What minimum diameter is required for the wire
A particle moving along the x axis in simple harmonic motion starts from its equilibrium position, Determine the maximum speed and the earliest time
An ammeter with an internal resistance of 53.0 ? measures a current of 5.75 mA in a circuit containing a battery and a total resistance of 1290 ?. Determine the actual value of the current
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