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Consider the situation in the figure - a student diver in a pool and an instructor on the edge, outside the water. Since the indices of refraction of air and water are different, the light rays coming from the diver and the instructor are refracted at the surface, changing their apparent position with respect to each other. The diver sees the instructor at an apparent angle of θa = 23°, measured from the normal to the interface
Find the apparent depth of the diver's head below water as seen by the instructor in meters, assuming the diver and his image both have the same horizontal distance along the surface of the water.
A 100 kilogram person is three fourths of the way up a 10 meter ladder that is resting against a smooth frictionless wall. Find what is the normal force of wall on the ladder
A person with a weight of 273.6 lb stands on two feet with their weight equally distributed between the two shoes, What is the pressure on each shoe independently
A (2m x 3m) plate of aluminum has a mask of 324 kg. It's density in 2700 kg/m3. Find its thickness
A propeller is modeled as five identical uniform rods extending radially from its axis. The length and mass of each rod are 0.859 m and 2.85 kg, respectively. When the propellor rotates at 567 rpm (revolutions per minute), what is its rotational kine..
a mass of 0.30 kg hanging from a spring with a spring constant of 86.8 nm is set into an up-and-down simple harmonic
A fisherman reels in 15.0 m of line while landing a fish, How much work does the tension in the line do on the fish
A radioactive sample produces 5120 decays at one point in an experiment and 40.96 minutes later produces 320 decays per minute. What is the half life
A rod with an initial length of 4.67 m i heated from a temperature of 5 oC to 58 oC. What is the new total length of the rod
a 6.40 tall cylinder floats in water with its axis perpendicular to the surface. the length of the cylinder above water
The position vector of a particle of mass 2 kg is given as a function of time by r = (9 m) (i hat) + (3 m/s)t (j hat). Determine the magnitude of the angular momentum of the particle with respect to the origin at time 9 s. Answer in units of kg*m2/
A 3.0-kg and a 5.0-kg box rest side-by-side on a smooth, level floor. How hard do the two boxes push against each other
What force must be applied to push a carton weighing287 newtons up a 19° incline, if the coefficient of kineticfriction is 0.3. Assume the force isapplied parallel to the incline and the velocity is constant.
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