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A 1.0-cm-thick layer of water stands on a horizontal slab of glass. A light ray in the air is incident on the water 60 degrees from the normal. What is the ray's direction of travel in the glass?
Two equally charged insulating balls each weigh 0.50 g and hang from a common point by identical threads 30 cm long, What is the magnitude of the charge on each ball
A car and driver have a combined mass of 100 kg. What is the force of the hill on the car as it passes over the top
When driving west toward the Rocky Mountains, you see a peak 2.8 above the horizon. Your GPS gives your current elevation as 1500, Find the peak's elevation
Calculate the absolute pressure at the bottom of a fresh-water lake at a depth of 31.2 m. Assume the density of the water is 1.00 103 kg/m3 and the air above is at a pressure of 101.3 kPa
A race car starts from rest on a circular track of radius 339 m. The car's speed increases at the constant rate of 0.440 m/s2. estimate the speed of the race car
For a certain change, the value of ëU is -2.37 kJ. During the change, system absorbs 650 joules. How much work did the system do.
question1a light ray of wavelength 589 nm is incident at an angle theta on the top surface of a block of polystyrene
A 3.00-kg mass undergoes an acceleration given by a = (2i+5j ) m/s2. The magnitude of the net force is
A car traveling at 25 m/s ( about 55 mph) crashes into a road barrier and comes to a stop in 0.2 sec. What is the average force in Newtons felt by a 75 Kg person in a set belt
Light of wavelength 60nm illuminates a hydrogen atom in an excited state. What energy level was the electron in initially
A dockworker applies a constant horizontal force of 89.0N to a block of ice on a smooth horizontal floor
A mass m = 90 kg slides on a frictionless track that has a drop, followed by a loop-the-loop with radius R = 18.8 m and finally the flat straight section at the same height as the center of the loop (18.8 m off the ground). Because the mass would not..
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