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An inflatable life raft is released from an air plane at 300 m altitude, in level flight, with an air speed of 120 m/s in the horizontal direction. Neglecting air resistance, how long before the raft strikes the water?
A 62kg hiker starts at an elevation of 1500m and climbs to the top of a 3500m peak, What is the minimum work required of the hiker
A hockey puck Brests on a smooth surface of ice and is struck by a second puck A, Compute the speed of puck after the collision
A spaceship with rest mass m0 is traveling with an x-velocity V0x=+4/5 in the frame of the earth. what is the energy of the photon torpedo in the frame of earth
a square coil of side 10 cm consists of 20 turns and carries a current of 12 a. the coil is suspended vertically and
As a baseball is being thrown, it goes from 0.0 to 40.0 ms in 0.34 s, What is the acceleration of the baseball
A person with a remote mountain cabin plans to install her own hydroelectric plant. A nearby stream is 3.00 m wide and 0.500 m deep. Water flows at 1.05 m/s over the brink of a waterfall 5.10 m high. The manufacturer promises only 25.0% efficiency..
You are trying to lose weight by working out on a rowing machine. Each time you pull the rowing bar (which simulates the "oars") toward you, What is the magnitude of the force that you exert on the handle
A light ray is directed at the inside of a highly polished silver hemispherical bowl and is incident parallel to the symmetry axis of the bowl. in what direction will it emerge from the bowl
A horizontal 790-N merry-go-round of radius 1.30 m is started from rest by a constant horizontal force of 45 N applied tangentially to the merry-go-round. Find the kinetic energy (Joules) of the merry-go-round
A 8 kilogram block of ice, released from rest at the top of a 1.50 meter long frictionless ramp, Find what would be the speed of the ice at the bottom
volumetric percentage of the propane liquid phase left the cylinder. Mass fraction of liquid propane in the cylinder
To make the dial of a watch glow in the dark, 1.20E-9 kg of radium226Ra is used. The half-life of this isotope is 1.60E+3 yr. How many kilograms of radium disappear while the watch is in utilize for 49.0 years?
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