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Two boxes (b1=26kg and b2=64kg) are being pushed across a horizontal frictionless surface, as the drawing shows. The 47-N pushing force is horizontal and is applied to the26-kg box, which in turn pushes against the64-kg box. Find the magnitude of the force that the26-kg box applies to the64-kg box.
Calculate the energy of the planet, perihelion and aphelion distances and the speed of the planet at these points - Explain why hurricanes spin counter clockwise in the Northern hemisphere and clockwise in the Southern hemisphere.
The ball starts 1.2 meters above the floor and after it is shot, it travels 1.2 meters along the ground before hitting the floor. If you assume the vertical acceleration is -9.8 m/s2, what is the launch velocity of the ball launcher in m/s?
A copper telephone wire has essentially no sag between poles 20.5 meters apart on a winter day while the temperature is -15.5° C. How much longer is the wire on the summer day when the temperature is 27.0° C.
Apply the boundary conditions to the ?nite square- well potential at x = 0 to ?nd the relationships between the coef?cients A, C, and D and the ratio C/D.
After a 0.839 nm x-ray photon scatters from a free electron, the electron recoils with a speed equal to 1.48E+6 m/s. Through what angle was the photon scattered
The moment of inertia of the marble depends on its radius. Explain why the answer to part (a) does not depend on the radius of the marble. Essay answers are limited to about 500 words (3800 characters maximum, including spaces).
A spring with a force constant of 1645 N/m is compressed 11.1 cm. Find the work done by the force compressing the spring
A runaway railroad car, with mass 30 x 10^4 kg, coasts across a level track at 1.5 m/s when it collides with a spring loaded bumper at the end of the track, What is the maximum displacement of the spring after the collision
an electron is moving at a particular instant parallel to a wire with a speed of 3 times 105 ms. the wire carries a
A space traveler weighs 550 N on earth. What will the traveler weigh on another planet whose radius is three times that of earth and whose mass is twice that of earth?
A 28.0 kg student slides down a slide that makes a 25.0o angle with the horizontal. What is the magnitude of the normal force that the slide exerts on the child
A 2.0-m-long, 22-kg ladder is resting against a house wall, making a 32 angle with the vertical wall. The coefficient of static friction between the top of the ladder and the wall the coefficient is 0.00. Determine the minimal coefficient of stati..
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