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A sledge loaded with bricks has a total mass of 17.1kg and its is pulled at constant speed by a rope inclined at 20.0 degrees above the horizontal. the sledge moves a distance of 20.8 m on a horizontal surface. The coefficient of kinetic friction between the sledge and surface is 0.500. A. what is the tension in the rope. B. how much work is done by the rope on the sledge? c. what is the mechanical energy lost due to friction?
You have a 77.7-cm-long copper rod with a rectangular cross section of dimensions 5.75 cm by 8.13 cm. Find the heat current through the rod
A 2.30 kg mess kit sliding on a frictionless surface explodes into two 1.15 kg parts: 2.32 m/s, due north, and 5.90 m/s, What is the original speed of the mess kit
A 423 Hz sound wave travels through a substance. What is the speed of sound in the substance
A proton is accelerated from rest through a potential difference of 350MV, What's the ratio of kinetic to rest energy
A 1200 crate slides 15 down a ramp that makes an angle of 30 with the horizontal. how much thermal energy is created
the moon is 3.5 * 106 m in diameter and 3.8 * 108 m from the earth's surface. compute the diameter of the moon's image
A locomotive pulls a train along a straight, horizontal track at constant velocity. What horizontal forces act on the train and the locomotive
determine average net force exerted in the barrel of cannon.
A single loop of wire of radius 3 cm carries a current of 2.9 A. What is the magnitude of B on the axis of the loop at the following the center of the loop
A projectile is launched with a launch angle of 65° with respect to the horizontal direction and with initial speed 14 m/s. what launch angle produces the longest time of flight
A wedge of air is formed between two glass plates that are 9.0 cm long, with one edge touching, How far apart are the maxima for the reflected light with ? = 665 nm
A 88 g cube of ice at 0°C is dropped into 1.0 kg of water that was originally at 76°C. What is the final temperature of the water after the ice has melted
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