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the figure shows a zero-resistance rod sliding to the right on two zero-resistance rails separated by the distance l
a 200 kg frictionless block is attached to a horizontal spring as shown at t 0 the position x 0225 mnbsp and the
an ideal monotonic gas is compressed at a constant pressure of 09 atm from 18 l to 45 l note atmospheric pressure is
assume a spacecraft is orbiting the earth at a constant radius of 700x103km at t0 a lateral rocket is fired that
an object of mass m is dropped at t 0 from the roof of a building of height h while the object is falling a wind
suppose magnetic monopoles may exist first start off by writing maxwells equations in electro- and magneto-statics and
in the atwood machine shown below m1 200 kg and m2 535 kg the masses of the pulley and string are negligible by
010mol of nitrogen gas follow the two processes shown in the figurefigure 1 part a how much heat is required for
a cube 21cm on each side contains 35g of helium at 20 circ rm c 1400j of heat energy are transferred to this gaspart a
220g of copper pellets are removed from a 300circ rm c oven and immediately dropped into 700ml of water at 190circ c in
two containers contain the same gas at different temperatures and pressures as indicated in the figure the small
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