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A) Estimate the change in gravitational potential energy of a 70 kilogram skier-Earth system when the skier goes down this slope.
B) If 20 percent of the gravitational potential energy change is converted into kinetic energy, determine how fast is the skier traveling at the bottom of the slope?
Gold, which has a density of 19.32 g/cm3, is the most ductile metal and can be pressed into a thin leaf or drawn out into a long fiber. what is the length (in m) of the fiber
A Cepheid variable has been found to have a period of 22 days, from this its luminosity is determined to be 2.8 x 1029 W, Use this information to calculate the distance to the Cepheid
consider a heat pump which is used to cool down a home during the summer. its coefficient of performance in cooling
You drop a stone into a deep well and hear it hit the bottom 3.10 s later. This is the time it takes for the stone to fall to the bottom of the well, How deep is the well
A thin rod of mass M and a length L rests on a frictionless table. this rod is stuck at a point L/4 from its center of mass by a clay ball of mass m with a speed v perpendicular to the rod. the clay ball sticks to the rod. determine the translatio..
A model of a red blood cell portrays the cell as a spherical capacitor a positively charged liquid sphere of surface area A separated from the surrounding negatively charged fluid by a membrane of thickness t. Estimate the capacitance of the cell
A horizontal force of 150 N is used to push a 42.5 kg packing crate a distance of 6.90 m on a rough horizontal surface. If the crate moves at constant speed, find each of the following. the work done by the 150 N force
Two parallel wires are 13 centimeter apart. Each wire is 6 centimeter long. Calculate the force between the two wires
if you walk 6.0 km in a straight line in a direction north of east and you end up 2.0 km north and several kilometers
A block of mass m is accelerated across a rough surface by a (massless) rope passing over an ideal pulley and connected to a second mass m2. Derive an expression for the acceleration of the sliding block
In the Bohr model of the hydrogen atom the electron orbits the proton in a circular orbit. Calculate the orbital frequency of the electron
A 60.0 kg woman stands at the rim of a horizontal turntablehaving a moment of inertia of 500 kgm^2 and a radius of 2.00m. How much work does the woman do to set herself and theturntable into motion
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