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A 61.0 skier is moving at 6.15 on a frictionless, horizontal snow-covered plateau when she encounters a rough patch 3.55 long. The coefficient of kinetic friction between this patch and her skis is 0.350. After crossing the rough patch and returning to friction-free snow, she skis down an icy, frictionless hill 3.35 high. How fast is the skier moving when she gets to the bottom of the hill? How much internal energy was generated in crossing the rough patch?
A 4.9 cm tall object is placed 25 cm in front of a spherical mirror. It is desired to produce a virtual image that is upright and 3.9 cm tall. Where is the image located? What is the focal length of the mirror?
A 25 g glass tumbler contains 450 mL of water at 24°C. what is the final temperature of the drink
A beam of X-rays having a wavelength of .09nm impinges on an unknown crystal. What is the spacing between the atomic plates
Two masses of 3 kg and 5 kg collide head-on, the former moving to the right with the speed 5m/s, What amount of mechanical energy is lost
the next two questions refire to the following scenario. Determine the horizontal velocity of the arrow
While a person is walking, his arms swing through approximately a 45.0 degree angle in 0.420s, What is the acceleration of a 0.900 gram drop of blood in the fingertips at the bottom of the swing
Trucks with diesel engines have an efficience of about 40%. How much energy is requried to accelerate an 8,000kg truck from rest to 25 m/s
A 700kg car stopped at an intersection is rear-ended by a 1800kg truck moving with a speed of 16.0 m/s, find the final speed of the truck
The longest "string" (a thick metal wire) on a particular piano is 2.0 m long and has a tension of 300.0 N. What is the total mass of the wire
A positive charge of q1 is located 4.59 m to the left of a negative charge q2. The charges have different magnitudes. How far to the left of the negative charge is one spot
For the shear building shown, determine the natural frequencies (RAD/SEC) and the modal matrix. Also, sketch the deflected buildings in their normal modes using the top floor as the reference floor (set its displacement = unity). Finally, demonstr..
A room has dimensions 2.98 m (height) × 4.59 m × 6.03 m. A fly starting at one corner flies around, ending up at the diagonally opposite corner. What is the magnitude of its displacement
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