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A cave rescue team lifts an injured spelunker directly upward andout of a sinkhole by means of a motor-driven cable. The lift isperformed in three stages, each requiring a vertical distance of15.0 m: (a) the initially stationaryspelunker is accelerated to a speed of 3.30m/s; (b) he is then lifted at theconstant speed of 3.30 m/s; (c) finallyhe is decelerated to zero speed. How much work is done on the 82.0kg rescue by the force lifting him during each stage?
question1a 32 percent efficient electric power plant generates 700mw of electric power and discharges waste heat into
Jack wants to build a radio to tune to a station at 520 MHz. He has available 0.25 micro hertz inductor, What value of capacitance should be used
A 1.7kg block oscillates on a spring with spring constant 16N/m . At t = 0 s the block is 20 cm to the right of the equilibrium position, obtain the period of the oscillation.
Assume that, when Hiawatha aims vertically, his arrow reaches a maximum height of 20 m. Use this fact to find the initial speed u with which Hiawatha can launch the arrow vertically.
A ground state hydrogen atom absorbs a photon of light having a wavelength of 93.06 nm. What is the final state of the hydrogen atom
An extension cord made of two wires of diameter 0.129cm (no. 16 copper wire) and of length 2.2m is connected to an electric heater which draws 17.0 A on a 120V- line, How much power is dissipated in the cord
Some bacteria are propelled by biological motors that spin hair-like flagella. How long does it take the motor to make one revolution
a shell is fired at an angle of 20 degree above the horizontal at a velocity of 200 msa what is the range ?b what is
A jetliner can fly 5.32 hours on a full load of fuel. Without any wind it flies at the speed of 220 m/s. The plane is to make a round-trip by heading due west for a certain distance, turning around, and then heading due east for the return trip.
A 2.0-kg piece of marble at 100 degree C is dropped into 1.5 kg of water at 1.0 degree C, What is the specific heat of the marble
A particle whose mass is 2 kg moves in the xy plane with a constant speed of 3 m/s in the x direction along the line y = 5. What is its angular momentum (in kg×m2/s) relative to the origin
A uniform-density 8 kg disk of radius 0.27 m is mounted on a nearly frictionless axle. Initially it is not spinning. A string is wrapped tightly around the disk, and you pull on the string with a constant force of 39 N by a distance of 0.7 m. Now ..
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