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Using the Hamiltonian for the harmonic oscillator, or otherwise, show that the expectation value of the kinetic energy is equal to the expectation value of the potential energy and half that of the total energy.
A car is traveling at 15 m/s on a horizontal road. The coefficient of kinetic between the tires and road is
A prism is made of glass of unknown RI. A parallel beam of light is incident on a face of the prism. The angle of min deviation is measured to be 40 degree. What is the Refractive Index of the prism
Late one night on a highway, a car speeds by you and fades into the distance, How far away from you is this car when its taillights appear to merge into a single spot of light because of the effects of diffraction
Two tugboats pull a disabled supertanker. Each tug exerts a constant force of 1.40×106N , What is the total work done by the two tugboats on the supertanker
Three people pull simultaneously on a stubborn donkey. Jack pulls eastward with a force of 82.1 N, Jill pulls with 64.3 N in the northeast direction, What is the direction of the net force
A 563 kg car moving at 19.7 m/s hits from behind another car moving at 14.6 m/s in the same direction. what is the velocity of the first car after the collision
The displacement of a wave traveling in the positivex-direction is y(x,t)=(3.5cm)cos(2.7x?92t), wherex is in m and t is in s, What is the wavelength of this wave
King Arthur's knights fire a cannon from the top of the castle wall. The cannonball is fired at a speed of 50 m/s and at an angle of 35°. What is the ball's maximum height above the ground
Define potential difference. What is the difference between electric potential and electric potential energy? What is the unit for potential difference
An athlete at the gym holds a 3kg steel ball in his hand. His arm is 70 cm long and has a mass of 4kg. What is the magnitude of the torque about his shoulder
A golf ball is struck off a tee (negligible height and air resistance) with initial velocity of 50 meters per second at an angle of 30 degrees above the horizontal. Illustrate what will be the vertical component of velocity after 2.5 seconds?
Tom and Mary are riding a merry-go-round. Tom is on a horse about half way between the center and the outer rim, Which child has the larger angular speed
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