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A flashlight beam strikes the surface of a pane of glass (n = 1.58) at a 56 %u2218 angle to the normal. What is the angle of refraction?
A baseball (m = 137 g) approaches a bat horizontally at the speed of 40.6m/s (91 mi/h) and is hit straight back at a speed of 45.1m/s (101 mi/h). If the ball is in contact with the bat for a time of 1.00 ms, what is the average force exerted on the..
An air-filled parallel-plate capacitor has plates of area 2.20 cm2 separated by 2.00 mm. What is the charge on the capacitor
A 0.70 kg ball is moving horizontally with a speed of 5.1 m/s when it strikes a vertical wall. What is the magnitude of the impulse of the ball
Water flows trough a normal garden hose at 2 m/s. how fast does the water emerge from the hose nozzle
A ball rolls off a platform that is 6.8 meters above the ground. The ball's horizontal velocity as it leaves the platform is 7.4 m/s.How much time does it take for the ball to hit the ground
A ladder of mass 30 kg and length 5m leans against a frictionless wall. The angle between the ladder and the wall is 37 degree. what is the force between the ladder and the wall
The car now stops, and the four people get out. By how much does the car body rise on its suspension owing to this reduce in weight.
consider two solid disks of identical radius and thickness. one of the disks is made of aluminum (density=2.7g/cm), what is the ratio between the two moments of inertia
Water is lifted out of a well 22.0m deep by a motor rated at 1.40hp .Assuming efficiency 90% , how many kilograms of water can be lifted in 1 min
An electric dipole is formed from 1.0nC charges spaced 3.00 mm apart. What is the electric field strength at the given points
In a film projection apparatus it is desired to produce pictures12 feet wide on a screen 50 feet from the lens; What must be the focal length of the projection lens used
You are rotating a 2.0kg rock in a vertical circle,using a very light string. Find the speeds of the rock at the highest and lowest position
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