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a transformer is used by a european traveler while she is visiting the united states she primarily uses it to run a
a 140g arrow is shot vertically from a bow whose effective spring constant is 500 nm if the bow is drawn 60cm before
a 2-kg block is initially at rest on a horizontal frictionless surface at x o a horizontal force of f 25 - x2 i is
a 45kg child stands at rest on ice skates she catches a 050kg ball moving horizontally at 95 ms what is her speed after
a car of mass m is initially moving with a velocity v the driver hits the brakes due to which the retarding force on
find the energy transferred in 1 h by conduction through a concrete wall 22 m high 390 m long and 020 m thick if one
if 750 kg of ice at -500degc is added to 120 kg of water at 15degc compute the final temperature t 0 chow much ice
a 45 kg woman cheats on her diet and eats a 439 calorie 439 kcal jelly donut for breakfasta how many joules of energy
a styrofoam box has a surface area of 079 m2 and a wall thickness of 20 cm the temperature of the inner surface is
a 240 kg gold bar at 270degc is placed in a large insulated 0800 kg glass container at 150degc with 200 kg of water at
a 189g block is launched by compressing a spring of constant k 200 nm a distance of 15cm the spring is mounted
suppose 0380 kg of water initially at 450degc is poured into a 0300 kg glass beaker having a temperature of 250degc a
say the electrical company needs to step down the voltage from 7200v rms in the power line behind your house to the
calculate the inductance si units henries of a coil of wire having a loop diameter of 05 cm and length of 1 cm the wire
in a youngs double-slit experiment two rays of monochromatic light emerge from the slits and meet at a point on a
light of wavelength 669 nm is incident on a double slit the angle between the central bright fringe and the second dark
a space freighter has a total mass of 100106 kg the captain wants to travel to a destination 100 light years away in 12
a pion decays into a muon and a neeutrino in the rest frame of the pion the muon always has a speed of 507c if a beam
in a double-slit experiment the slit separation d is 130 times the slit width w how many bright interference fringes
a 28kg rock approaches the foot of a hill with a speed of 15 ms this hill slopes upward at a constant angle of 40
the spaceship enterprise 1 is moving directly away from earth at a velocity that an earth-based observer measures to be
suppose that the speed of light in a vacuum were one million times smaller than its actual value c 300 x 102 ms the
a jetliner has a mass of 11 x 105 kg and flies at a speed of 120 msa find the value of its momentumb if the speed of
suppose youre building a scale model of the hydrogen atom and the nucleus is represented by a ball of radius 32 cm
a wooden shelter has walls constructed of wooden planks 100 cm thick if the exterior temperature is -200degc and the