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Calculate the de Broglie wavelength ? of an electron with energy EF in sodium, and compare the value with the atomic separation R in sodium.
A wooden block of mass M = 0.170 kg is placed on a wooden inclined board 0.930 m long and raised to a height h1 = 0.050 m at the lower end and h2 = 0.080 m at the upper end, Draw the FBD of the block on the plane. Calculate work done on the block ..
An unfortunate subject receives doses of the following types of radiation: ? rays (20 mrad, RBE=1), electrons (45 mrad, RBE=1), What is the total biologically equivalent dose received
The speed of the fastest-pitched baseball was 45.0 m/s , and the ball's mass was 145g. How many joules of kinetic energy did this ball have
In Denver, children bring their old jack-o-lanterns to the top of a tower and compete for accuracy in hitting a target on the ground, what is the launch speed needed to hit the bulls-eye
A scaffold of mass 44 kg and length 6.0 m is supported in a horizontal position by a vertical cable at each end. What is the tension in the cable closer to the painter
What least horsepower must a motor have to be able to drag a 280 box along a level floor at a speed of 1.05 if the coefficient of friction is 0.50.
You are given 65.000 cm of copper wire with diameter 7.0000 mm. At what rate is thermal energy generated in the loop
The two forces in each pair could have different physical origins (for instance, one of the forces could be due to gravity, and its pair force might be due to friction or electric charge).
Mr. Gewanter, who's mass is 60.0 kg, is doing physics demonstration in the front of the classroom. a) How much gravitational force does he exert on 55-kg Martha in the front row, 1.50m away? b) How does this compare to what he exerts on 65-kg Lest..
A 2 kg block and a 3 kg block are pushed across a 2 m long frictionless table, Compare the kinetic energies of the two blocks when they reach the end of the table
Throughout a race, runner runs 10.0 meters north, turns 45 degrees north of east, and runs 5 meters. Then, after a while, the runner turns due east and runs for 15 meters to finish the race. What is the magnitude and direction of the runner's tota..
Find the gravitational pull between earth and the moon. Given, mass of earth = 5.97 * 10^24 kg, mass of moon = 7.35 8 10 kg,
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