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On an ice rink, two skaters of equal mass grab hands and spinin a mutual circl e once every 2.5s. If we assume their arms areeach 0.80m long and their individual masses are 60.0kg, how hard are they pulling on one another?
A satellite is in a circular orbit very close to the surface of a spherical planet. The period of the orbit is 2.50 hours. What is the density of the planet? Assume that the planet has a uniform density.
What is the approximate radius of Earth? Its mass is 6.0*10^24 kilograms and the acceleration due to gravity at its surface is 9.8 m/s2
Towns A and B in are 80.0 km apart. A couple arranges to drive from town A and meet a couple driving from town B at the lake, L. The two couples leave simultaneously and drive for 2.50 . Car 1 has a speed of 90.0 km/h. If the cars arrive simultaneous..
An ambulance traveling at 47 m/s approaches a car heading in the same direction at a speed of 37 m/s. At what frequency does the driver of the car hear the siren
a falling flower pot passes a 1.5 m tall window of an apartment building in a time of .16 s. from what height above the top of the window was the pot dropped
A pulley system lifts 400N to height of 15 meters in 6 seconds. How much work is done on the object. What power was generated
A 0.50 kg mass is attached to a spring with a force constant of 30 N/m, How far is the mass from the equilibrium position when its speed is half the maximum speed
A light bulb is wired in series with a 122-? resistor, and they are connected across a 120.0-V source. What is the resistance of the light bulb
A silver rod and a common glass rod both have the same length when at 20.0°C. The silver rod is heated to 52.3°C. To what temperature must the glass rod be heated so that they are again at the same length?
Calculate the work done on 0.205 mol of methane when it is compressed from 10.0 L to 2.25 L at 25 degree's Celsius, assuming that methane is (a) an ideal gas and (b) a van der Waals gas.
A block is pushed up a 20.0 (degrees) frictionless incline with an initial speed 12.0 m/s. How much time does it take to return to its starting position
A lens placed at the origin with its axis pointing along the x axis produces a real inverted image at x=-24cm that is twice as tall as the object
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