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A ray of light traveling in air enters benzene contained in a rectangular tank whose walls are made of ice. The bottom of the tank is a mirror. The original ray makes an angle of 70.0o with the normal (vertical) upon entering the benzene at the top of the tank. The ray travels through the benzene, reflects off the mirror at the bottom of the tank, and strikes the vertical side of the tank. What angle does the ray make with the horizontal (normal) when it reaches the side of the tank? At the point where it hits the side, does any of the light refract into the ice?
What is minimum important in returning blood to the heart? Negative intrathoracic pressure, valves and veins, the pumping action of skeletal muscles, or the pushing of blood by arterial system.
a 6.0 cm diameter horizontal pipe gradually narrows to 4.5 cm. When water flows through the pipe at a certain rate, What is the volume rate of flow
An object with mass 1.2 kg slides down a smooth ramp. Initial height is 2m. It is a smooth horizontal track (no friction). by how much is the spring compressed by the object
A uniform plank of length 4.50 m and weight 275 N rests horizontally on two supports, with 1.1 m of the plank hanging over the right support. To what distance x can a person who weighs 456 N walk on the overhanging part of the plank before it just be..
A wagon is rolling forward on level ground. Friction is negligible. The person sitting in the wagon is holding a rock. The total mass of the wagon, rider, Find the speed of the wagon
A playground merry-go-round of radius R = 2.20 m has a moment of inertia I = 235 kg · m2, What is the new angular speed of the merry-go-round
A 564 Hz sound wave travels through a substance. What is the speed of sound in the substance
You ionize a hydrogen atom with a photon with wavelength 77.5nm. What orbital was the electron in before ejection
q. a play place is on the flat roof of a city school 6.00 m above the street below. the vertical wall of the building
A 4.8-kg bucket of water is raised from a well by a rope. find the force exerted by the rope on the bucket
When a hammer strikes a nail, it is compressed along its length. Suppose that a steel nail 8.00 cm long, What average force was exerted on the nail by the hammer
Presume your local government wants to raise your taxes in order to support the construction of wind and solar power plants that can give your town with low-polluting energy and help decrease your town's dependence on fossil fuels for energy. Would y..
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