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On a frictionless horizontal air table, puck A (with mass 0.246 ) is moving toward puck B (with mass 0.370 ), which is initially at rest. After the collision, puck A has velocity 0.125 to the left, and puck B has velocity 0.655 to the right. What was the speed of puck A before the collision?
A 0.500 kg particle moving along a straight line with a position vector given by r = (-2.00t2 - t) i(hat) + 5.00 j(hat), with r in meters, Obtain the kinetic energy of this particle
A spring with constant k = 10 N/m is attached to a block. What is the force on the block by the spring when the spring has been stretched by 0.05 m
A lava bomb is a missile composed of cooling, practicallysolid lava. You are a geologist, watching a volcano launch a lava bomb straight upward. find the Initial Speed at which the lava bomb got launched
Chromium is produced by reacting its oxide with aluminium. If 354 g of Cr2O3 and 158 g of Al react to form 204 g of Al2O3, how many grams of Cr are formed.
A 47% efficient device uses chemical energy to generate 550J of electric energy. How much chemical energy is used
If the pump outlet is blocked and the handle pushed until internal length of the pump cylinder is 21, by how much does the air temperature rise? Suppose that no heat is lost.
Water at 22.0 °C is sprayed onto 0.203 kg of molten gold at 1063 °C (its melting point). What is the minimum mass of water that must be used
a firefighter directs a horizontal stream of water toward a fire at an angle of 40deg measured from the horizontal.
Suppose a 65 kg person stands at the edge of a 6.5 m diameter merry-go-round turntable that is mounted on frictionless bearings and has a moment of inertia of 1850 kg m2. Calculate the angular velocity of the turntable
A concrete slab is 9.7 cm thick and has an area of 4.6 m^2. What minimum power must be supplied to the coils to maintain a temperature difference of 17.3 Degrees C between the bottom of the slab and its surface
A burning firecracker is tossed into the air at an angle of 60 degrees up from the horizon. If it leaves the hand of the hurler at the speed of 30 m/s, how long should the fuse be set to burn if the explosion is to occur 20 m away. Ignore friction..
A halfback is initially running south at a speed of 9.90 m/s, quickly cuts to his right, and 0.505 s later is running 60.0° west of south at 9.10 m/s
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