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A 25 kg bear slides, from rest, 12 m down a lodgepole pine tree, moving with a speed of 5.6 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 converging lens with focal length of 6.0cm is placed 8.0 cm to the right of a diverging lens of focal length of -4.0 cm. A .4 cm tall object is placed 4.0 cm in front of the diverging lens
A 6.00?kg ball is dropped from a height of 13.0m above one end of a uniform bar that pivots at its center. The bar has mass 7.50kg and is 6.80m in length. How high will the other ball go after the collision
A diver beneath the surface of water in a lake looks up at 27 degrees from the vertical to see a life ring floating on the surface. How far is the base of the smokestack from the life ring
Determine the period of the wave motion.
A 1020 kg car moving 40.0 m/s rear ends a 560 kg car at stop. When they collide, the bumpers lock and they move together. how much energy was lost as heat and vibration
You pull with a force of 295 N on a rope that is attached to the block of mass 20 kg, and the block slides across the floor at a constant speed of 1.2 m/s. The rope makes an angle of 35 degrees with the horizontal.
A spaceship travels at a constant speed from earth to a planet orbiting another star. When the spacecraft arrives, How far away is the planet according to observers on earth
A light bulb is connected to a 120.0-V wall socket. The current in the bulb depends on the time t according to the relation I = (0.703 A) sin [(257 rad/s)t]. What is the average power delivered to the light bulb
q1. two point charges q1 -6.7 mu c and q2 3.0 mu c are located between two oppositely charged parallel plates. the
An iron nail is brought near a magnet. Which of these is not true? The nail is ferromagnetic. The nail becomes a north pole or a south pole. The nail exerts an attractive force on the magnet. The nail has a north pole and a south pole. The magnet exe..
a double- slit interference experiment is performed with two very narrow slits separated by 0.15 mm. what is the distance between two nearby bright fringes on the screen
Consider an ideal gas at 27 degree C and 1 atm. To get some idea how close these molecules are to each other, What is the length of an edge of each cube if adgacent cubes touch but not overlap
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