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220g of copper pellets are removed from a 300circ rm c oven and immediately dropped into 700ml of water at 190circ c in
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a cylinder of cross-sectional area 11 cm2 is fitted with a piston which is connected to a spring with a spring constant
a hydrogen atom has a radius of about 005 nm a estimate the uncertainty in any component of the momentum of an electron
40kg of water at 30 c is mixed with 40 kg of water at 47 c in a well-insulated container estimate the net change in
a 120 g insulated aluminum cup at 17 c is filled with 140 g of water at 40 c after a few minutes equilibrium is reached
a refrigerator moves energy from a cold reservoir the inside of the refrigerator to a hot reservoir the kitchen but
suppose a heat engine has an efficiency of 0201 and produces 109times104 j of work how much energy is pulled in from
suppose a heat engine pulls 337times104 j of work from the hot reservoir and 752times103 j of that energy is used to
a styrofoam box has a surface area of 074 m2 and a wall thickness of 20 cm the temperature of the inner surface is
in a physics lab experiment a student immersed 205 one-cent coins each having a mass of 300g in boiling water after
a clock has an aluminum pendulum with a period of 1000 s at 207 degc suppose the clock is moved to a location where the
a pulley of radius 20cm and moment of inertia is suspended from a ceiling and has a long string of negligible mass
a 40-g block of ice is cooled to 72degc and is then added to 640 g of water in an 80-g copper calorimeter at a
a 500-g lead bullet traveling at 300 ms is stopped by a large tree if half the kinetic energy of the bullet is
one mole of oxygen gas is at a pressure of 540 atm and a temperature of 290degc a if the gas is heated at constant
a 108-g cube of ice at 0degc is dropped into 10 kg of water that was originally at 76degc what is the final temperature
jack was exposed to fast neutrons he received a radiation dose of 160 rem on part of his hand affecting 270 grams of
a 70 kg human body typically contains 140 g of potassium potassium has a chemical atomic mass of 391 u and has three
ground beef may be irradiated with high-energy electrons from a linear accelerator to kill pathogens in a standard
you work in a materials testing lab and your boss tells you to increase the temperature of a sample by 466 c the only
a spring oscillator is designed with a mass of 0144 kg it operates while immersed in a damping fluid selected so that
in a physics lab experiment for the determination of moment of inertia a team weighs an object and finds a mass of 298
a satellite is placed into an earth orbit and passes 100miles above the ground as its closest point while moving at