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A 65kg skier is moving at 6050 m/s on a frictionless, horizontal snow-covered plateau when she encounters a rough patch3.50m long. The coefficient at kinetic friction between this patch and her skis is 0.300. After crossing the rough patch and returning to friction-free snow, she skis down an icy frictionless hill 2.50m high,
1. How far the skier moving when she gets the bottom of the hill?
2. How much internal energy was generated in crossing the rough patch?
derive an expression for the shift in lambda in the peak wavelength of the planck function for a black body temperature
The 2.4m Hubble space telescope has been placed into Earth orbit by the same space shuttle. What angular resolution could this telescope achieve by Rayleigh's criterion
The electric field midway between two equal but opposite point charges is 845 N/C, and the distance between the charges is 16.0 cm. What is the magnitude of the charge on each
The rear axle of a truck is 2.5 m long. If the truck is moving at 28 m/s and the vertical component of the earth’s magnetic field is 3.2 *10^-5T, what emf is induced between the ends of the axle?
Two metal spheres, each of mass 14 g and initially at rest, are dropped from a height of 6 m in an evacuated chamber. One sphere has a charge of +50 ?C, and the other has a charge -50 C.
A 2.5-kg cart is rolling along a frictionless, horizontaltrack towards a 1.5-kg cart that is held initially at rest. Thecarts are loaded with strong magnets that cause them to attract oneanother. Thus, the speed of each cart increases.
A concrete highway is built of slabs 13 m long at 20 degrees Celsius. How wide should the expansion cracks between the slabs (15degrees Celsius) be to prevent buckling if the range of temperature is -30 degrees Celsius to 51 degrees Celsius.
One end of a uniform rod of length 4L and weight Fg is supported by a cable. Determine the minimum distance, x from the wall, at which an additional object of weight Fg can be hung without causing the rod to slip
What would be the nature and height of the image?
A capacitor is connected across the terminals of an ac generator that has a frenquency of 430 Hz and supplies a voltage of 28 V. Find the capacitance of the second capacitor
state how much energy is transferred in each of the following casesa. 2 grams of steam at 100 degrees celsius condenses
While on a camping trip, you would like to carry water from the lake to your campsite. You have two non-identical buckets which you attach to a 1.35 m long rod. Which bucket holds more water
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