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A skier leaves the starting gate at the top of a ski jump with an initial speed of 4 m/s. the starting position is 120 m higher than the end of the ramp, which is 3 m above the snow. FIND THE FINAL SPEED of the skier if he lands 145 m down the 20 degrees slope. assume there is no friction on the ramp, but air resistance causes a 50% loss in the final kinetic energy. The GPS reading of the elevation of the skier is 4212 m at the top of the jump and 2017 m at the landing point.
A helium-neon laser (λ = 632.8 nm) is used to calibrate a diffraction grating. find the spacing between adjacent grooves in the grating
A 240kg block with mass density of 1200kg/m^3 was accidentally dropped into water and sink. What force should be applied to the block to pull it out of water
a large rectangular tub is filled to a depth of 2.60 m with olive oil, which has density 915 kg/m^3. If the tub has the length 5.00m and width 3.00 m, calculate the weight of the olive oil
A certain heat engine does 10.2 kJ of work and 9.5 kJ of heat is transfered to the environment in a cyclical process. What was the heat transfer into this engine
Light from an argon laser strikes a diffraction grating that has 5 310 grooves per centimeter. calculate vthe wavelength of the laser light
The rotational inertia of a collapsing spinning star changes to 1/4 its initial value. What is the ratio of the new rotational kinetic energy to the initial rotational kinetic energy.
The graphite in a pencil has a resistivity of 7.84×10^?6 W*m. The graphite's diameter is 0.700 mm and its length is 40.0 mm. Find the resistance of this graphite "wire."
A rock weighing 8528 N rock with a volume of 24 L is completely submerged in mercury. The density of mercury is 13.6 kg/L. Determine the buoyant force on the rock
At the intersection of Texas Avenue and University Drive, a yellow, subcompact car with mass 950 kg traveling east on University collides with a maroon pickup truck with mass 1900 kg that is traveling north on Texas and ran a red light
A spherical bowling ball with mass m = 3.2 kg and radius R = 0.107 m is thrown down the lane with an initial speed of v = 8.7 m/s. What is the magnitude of the final velocity
A solid sphere is released from rest on an incline. When it reaches the bottom, what fraction of its total kinetic energy is rotational
To keep her dog from running away while she talks to a friend, Susan pulls gently on the dog's leash with a constant force given by F = (2.1 N ) ^x+ (1.5 N )^y, How much work does she do on the dog
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