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A light ray of λ = 410 nmenters at an angle of incidence of 37.6o from air into ablock of plastic. Its angle of refraction is 23.0o. What is the speed of the light inside the plastic?
The eight ball m = 0.5 kg is initially moving with a velocity v = 4.2i m/s. What is the magnitude of the velocity of the eight ball after the collision in m/s
A gardener feels it is taking him excessively long to water a garden with a 0.952cm diameter hose. By what factor will his time be shortened, if he uses a 1.58 cm diameter hose.
a woman and her dog are out for a morning run to the river which is located 4.65 km away. the woman runs at 3.95 ms in
Two charges Q1=+6mC and Q2=+4mC are separated horizontally on a straight line, find the magnitude of the electric force between these charges
Sarah and her bicycle have a total mass of 40 kg. Her speed at the top of a 10 m high and 100 m long hill is 5 m/s. at what speed will she be going when she reaches the bottom
A net force of 36N accelerates a 5.1-kg mass over a distance of 12 m. What is the increase in kinetic energy of the mass
The sound intensity of a whisper is 1.0x10^-10 W/m^2 at one meter distance from the source. At what distance does the intensity level drop by an additional 1dB
The fundamental frequency of a closed organ pipe is 264.9 Hz. What is the length of the open pipe
Illustrate what tangential speed v must the bob have so that it moves in a horizontal circle with the string making an angle 19.0^circ with the vertical?
A 1550 kg car drives around a flat 200 m diameter circular track at 30 m/s. What is the magnitude and direction of the net force on the car
A stone is thrown upward with an initial velocity of 6 m/s. What maximum height will the stone reach
A horizontal force of magnitude 34.5 N pushes a block of mass 4.09 kg across a floor where the coefficient of kinetic friction is 0.609. During that displacement, the thermal energy of the block increases by 39.3 J. What is the increase in thermal ..
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