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An extreme skier, starting from rest, coasts down a mountain that makes an angle 25.0 degree with the horizontal. The coefficient of kinetic friction between her skis and the snow is 0.200. She coasts for a distance of 10.2 meter before coming to the edge of a cliff. Without slowing down, she skis off the cliff and lands downhill at a point whose vertical distance is 3.40 meter below the edge. Evaluate how fast is she going just before she lands?
A refrigerator uses an ideal Carnot cycle to cool its interior. The outside air has a temperature of 304 K, What is the coefficient of performance of this refrigerator
A string of length 0.276 m is fixed at both ends. The string is plucked and a standing wave is set up that is vibrating at its second harmonic. What is the frequency of vibration
The plates of a spherical capacitor have radii 54.8 mm and 57.3 mm. Calculate the capacitance in picofarads. What must be the plate area in square centimeters of a parallel-plate capacitor with the same plate separation and capacitance?
Peter and Carter are dropping rocks into a stream from a bridge at a height of 28 m above the water below, As Meg emerges from the water below she is struck by both rocks. Calculate the speed of each rock at impact with Meg
The position of a particle moving along the x axis isgiven by x = 6.0t2 -1.0t3, where x is in meters andt in seconds. What is the position of the particle
A man riding a bicycle 140kg together is traveling at 8.6 m/s due north when he is brought to a stop in .50 seconds by a gazelle running to the south. Calculate the original momentum of the cyclist(magnitude and direction)
puck 1 of mass m1 = 0.30 kg is sent sliding across a frictionless lab bench, to undergo a one-dimensional elastic collision with stationary puck 2. What is the mass of puck 2
A cart for hauling ore out of a gold mine has a mass of 427 kg, including its load. Find the work that the donkey performs on the cart during this process
A concert loudspeaker suspended high off the ground emits 42 W of sound power. A small microphone with a 1.0 cm2 area is 43 m from the speaker. (a) What is the sound intensity at the position of the microphone
When the Voyager I and Voyager II spacecraft were exploring the outer planets, NASA flight controllers had to plan the crafts' moves well in advance.How many seconds elapse between the time a command is sent from Earth and the time the command is ..
An object is placed 61.5 cm from a screen. Where should a converging lens of focal length 5.0 cm be placed to form an image on the screen? Find the magnification of the lens.
a frictionless inclined plane with angle of inclination theta is fixed to the floor of a train car accelerating in the
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