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A ray of light strikes a plane mirror at a 45° angle of incidence. The mirror is then rotated by 23° in the clockwise direction, while the incident ray is kept fixed. (a) Through what angle does the reflected ray rotate? (b) What is the answer to part (a) if the angle of incidence is 51° instead of 45°?
A 50 kg block is released from rest and then slides for a distanceof 2.0 meters down a ramp that is inclined 45 degrees above the horizontal. What is the spring constant of the ideal spring
A 300-m-wide river flows due east at a uniform speed of 4.4 m/s. A boat with a speed of 7.6 m/s relative to the water leaves the south bank pointed in a direction 25o west of north. How long does it take for the boat to cross the river
Two small plastic spheres are given positive electrical charges. When they are 18.0cm apart, the repulsive force between them has magnitude 0.300 N. find the charge on each sphere if the two charges are equal
What is constant acceleration
For lead 82Pb206 (atomic mass = 205.974440 u) obtain the binding energy per nucleon (in MeV)
Aingly-ionized lithium has a nucleus of charge +3e and two electrons. Use the variational principle to estimate the ground-state energy. Now consider a nucleus of charge Ze with two electrons. Use the variational principle to estimate the ground-st..
The current-density magnitude in a certain circular wire is J = (3.10 × 1010 A/m4)r2, How much energy is converted to thermal energy in 2.00 h
a simple harmonic oscillator of amplitude a has a total energy e. a determine the kinetic energy when the position is
You whirl a 0.50 kg rock on a string over your head. It takes 1.0 second for the rock to make a complete revolution. The string is 1.5 m long. What is the velocity of the rock, What is the centripetal acceleration of the rock, What is the tension in ..
an insulated beaker with negligible mass contains liquid water with a mass of 0.280kg and a temperature of 85.0?c .how
A 50.5 g ice cube, initially at 0°C, is dropped into a Styrofoam cup containing 360 g of water, initially at 19.2°C. What is the final temperature of the water
A potter's wheel is a uniform solid disk of diameter 0.72m and a mass of 60kg. what minimum total friction force must the potter supply to the disk if her hands are acting at the edge of the disk
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