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A chain of movie theaters is decorated with light fixtures that when the white light passes through a transparent plate, it becomes yellow light. How is this possible? What color is the light reflected from the plate? What's a hologram?
A space probe is fired as a projectile from the Earth's surface with an initial speed of 1.78 x 10^4 m/s. What will its speed be when it is very far from the Earth
a 4.64 kg block is on a plane inclined at 18.5 degrees with respect to the horizontal. What is the normal force
A satellite is in a circular orbit around an unknown planet. The satellite has a speed of 1.50 104 m/s, and the radius of the orbit is 5.45 106 m. What is the orbital speed of the second satellite
When you push a 1.95kg book resting on a tabletop it takes 2.50N to start the book sliding. Once it is sliding, though, it takes only 1.50N to keep the book moving with constant speed. What are the coefficients of static and kinetic friction betwe..
A woman stands on a scale in a moving elevator. Her mass is 69.0 kg, and the combined mass of the elevator, What does the scale read (in N) during the acceleration
The force involved in a collision is 1.0 × 10^2 newtons. What is the value of the change in momentum
The specific heat of a certain metal can be determined by measuring the temperature change that occurs when a piece of the metal is heated, What is the specific heat of the metal
A bullet of mass 10.1 g is fired into an initially stationary block and comes to rest in the block. How much kinetic energy is lost
A simple Atwood’s machine uses a massless pulley and two masses m1 and m2. Starting from rest, the speed of the two masses is 8.4 m/s at the end of 7.2 s. At that time, the kinetic energy of the system is 62 J and each mass has moved a distance of 30..
The ball leaves his racket with a speed of 16.0 m/s at an angle 5.5 degrees above the horizontal. The horizontal distance to the net is 7.0 m and the net is 1.0 m high. Explain by how much did the ball clear the net?
A thin, flexible rod of length L=10 cm carries charge Q=91 N/C uniformly along its length. What is the magnitude of the electric field at the center
If the hypotenuse of a right triangle is 6.00cm long, and the opposite is 4.00. What is the angle facing the opposite
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