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A 49 kg bear slides, from rest, 10 m down a lodgepole pine tree, moving with a speed of 3.8 m/s just before hitting the ground.
(a) What change occurs in the gravitational potential energy of the bear-Earth system during the slide?
(b) What is the kinetic energy of the bear just before hitting the ground?
(c) What is the average frictional force that acts on the sliding bear?
A 13g bullet traveling 223m/s penetrates a 2kg block of wood and emerges cleanly at 160 m/s. If the block is stationary on the frictionless surface when hit, how fast (m/s) does it move after the bullet emerges.
q1. an electron librated from a hot filament cathode is attracted by an anode with a potential of 1200v positive with
What is the terminal speed for a 76.0 skier going down a 41.0 snow-covered slope on wooden skis = 0.070? Suppose that the skier is 1.80 m tall and 0.500 m wide. Replace mg with net forces parallel to the incline.
Du Pont and net income Ebersoll Mining has $6 million in sales; its ROE is 12 percent; and its total assets turnover is 3.2 . The company is 50 percent equity financed. Illustrate what is its net income?
an average person uses 12000watt-hours per day, the cell is used for 6 hours a day at an incident of 1000wats/m^2, calculate the area need to supply this amount of power
A 2.31?102g piece of copper at a temperature of 401.K and a 1.07?102g piece of aluminum at a temperature of 2.17?102K, What is the equilibrium temperature of the mixture
Water is supplied to an office building 44.0 m high through a pipe at ground level. Find the pressure in the larger pipe on the ground floor
A 67.0 kg diver is 4.90 m above the water, falling at speed of 6.40 m/s. Calculate her kinetic energy as she hits the water
Presume the child remains horizontal during the fall to the floor. Note that a more complicated fall could result in a head velocity greater or less than the speed you calculate.
Given that apparent expansivity of a liquid is 0.00015x10(raised to power -3) per Kelvin and the linear expansivity of the container is 0.00012 x 10(raised to power -3) per Kelvin
Two parallel wires separated by 4.3 cm repel each other with a force per unit length of 1.6 multiply.gif 10-4 Nm. Find the current in the other wire
A cosmic ray electron moves at 7.00 multiplied by 106 m/s perpendicular to the earth's magnetic field at an altitude where field strength is 1.20 multiplied by 10-5 T
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