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A snow skier is skiing across a flat plain with a velocity of 3.5 m/s. Without knowing because the snowfall is so thick he skis off a cliff with vertical drop of 58m. The skiers mass with skis and all is 92kg. What is the initial potential energy of the skier the moment before he goes off the cliff? What is the final vertical velocity of the skier right before he hits the ground?
Estimate the change in enthalpy and entropy when liquid ammonia at 270oK is compressed from its saturation pressure of 328 kPa to1,200 kPa. For saturated liquid ammonia at 270oK, Vl=1.551x10-3 m3kg-1, and \(\beta=2.095x10-3K-1.\)
A unit vector lies in the xy plane, at an angle of 138 degrees from the +x axis, with a positive y component. What is the unit vector
External work equal to 4x10-7 J is needed to move a -5 nC charge at constant speed to a point at which the potential is - 20 V. What is the potential at the initial point
two 0.50g spheres are charged equally and placed 1.7cm apart. when released they begin to accelerate at 130ms2 . what
Trained dolphins are capable of a vertical leap of 7.0m straight up from the surface of the water-an impressive feat. What maximum horizontal range could the dolphin achieve
A playground carousel is free to rotate about its center onfrictionless bearings, and air resistance is negligible. What is the person's mass
Light of wavelength 624 nm passes through a single slit and then strikes a screen that is 1.2 m from the slit. What is the width of the slit
A parallel-plate capacitor made of two circular plates of radius R = 10 centimeter, is being charged. Find the magnitude of the induced magnetic field induced by the displacement current between the plates of the capacitor
An object moves according to x = 3 m e^(-2/s t), y = 4 m sin(3/s t), z = -5 m cos(3/st) . a. Find its velocity. b. Find its acceleration. Note: s is seconds ex:-2/s means -2 per second and m is meters
A 0.302-m-thick sheet of ice covers a lake. The air temperature at the ice surface is -16.0 °C. In 5.90 minutes, the ice thickens by a small amount. Calculate the number of millimeters by which the ice thickens
a 1.10m long straight wire has a resistance r 14.0 ohm and is connected to a 3.00v battery. the wire is located in a
She pumps the handle up and down, slowly lifting the car. What is the force exerted on the small piston during each downward stroke?
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