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A laser beam is directed from air (n = 1.0) into an unknown liquid. The angle of incidence is measured to be 60° and the angle of refraction is measured to be 45°. What is the index of refraction of the unknown liquid?
A novice skier, starting from rest, slides down a frictionless 33.0° incline whose vertical height is 128 m. How fast is she going when she reaches the bottom
A heat engine operating between energy reserviors of 119.94 oC, How much energy must this engine extract from the hot reservior to do 1,583.1J of work
An electromagnetic doorbell has been constructed by wrapping 66 turns of wire around a long, thin rod, What is the magnitude of the angular velocity of the rod
A cart (821.7g) connected to a hanging mass (240g) is free to move on an incline plane with an angle of 15.3 degrees. Determine which way the hanging mass will move
You are testing a new amusement park roller coaster with an empty car with mass 123 kg. One part of the track is a vertical loop with radius 11.1 m, how much work is done by the friction
A disk-shaped merry-go-round of radius 2.99 and mass 170 rotates freely with an angular speed of 0.623. Calculate the final kinetic energy for this system
q1. an electric force of 4.0 n exists between two objects separated from each other by a distance of r. if the distance
An arrow is fire with a speed of 20m/s at the block of Styrofoam resting on a smooth surface. The arrow penetrates a certain distance into the block before coming to rest relative to it.
A 3 kg block moves down a hill that makes a 40° angle with the horizontal direction, what is the magnitude of the acceleration of the block
How long a piece of wire would you need to form a circular arc subtending an angle of 1.6 rad, if the radius of the arc is 8.2 cm?
A wheel has a maximum rate of rotation of 150 revolutions per minute. Starting from rest, Calculate the magnitude of its angular acceleration
A spherical balloon is partially blown up and its surface area is measured. More air is then added, increasing the volume of the balloon. If the surface area of the balloon expands by a factor of 6.7 during this procedure, by what factor does the ..
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