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a container holds 23 mol of gas the total average kinetic energyof the gas molecules in the container is equal to the
the ph of a bicarbonate-carbonic acid buffer is 780 calculate the ratio of the concentration of carbonic acid h2co3 to
a 200g block is released from rest at a height of 25cm on africtionless 30o incline it slides down the inclineand then
two identical trucks have a mass of 5500kg when empty one truck carries a 9500 kg load and is moving at 65kmh it
calculate the size of the quantum involved in the excitation of an electronic motion of frequency 10 x hz express the
a satellite is in a circular orbit about the earth at a distance of one earths radius above the surface what is the
a 300 kg ball is dropped from the roof of a building 1764 m highwhile the ball is falling to earth a horizontal wind
the work function of an element is the energy required to remove an electron from the surface of the solid element the
a string passing over a pulley has a 380-kg mass hanging fromone end and a 315-kg mass hanging from the other end
1 a thin-walled plastic cigarette lighter was found to contain 42g of butane in an interior volume of 512ml calculate
a typical cup of tea is made by starting with six fluid ounces of cold water 177 ml how much heat in joules is required
a person whose mass is 850 kg is exposedto a whole-body dose of 250 rads how many joules of energy are deposited in the
a sample of natural gas at stp is 780 ch4 and 220 c2h6 by volume how much heat is produced from combustion of 160 l of
a barefoot field-goal kicker imparts a speed of 42 meters per second to a football initially at rest if the football
automobile air bags inflate during a crash or a sudden stop by the rapid generation of nitrogen gas from sodium azide
a book weighing 24 newtons is placed on the table what is the net force on the book in this case answer in units of
a piece of silver with mass 284 g has a heat capacity of 672 joc what is the specific heat of
a gas expands in volume from 267 ml to 849 ml at constant temperature calculate the work done in joules if the gas
an airplane propeller is 208 m in length from tip to tip and hasa mass of 117kg the propeller is rotating at 2400
1 assuming the pump and the air in it comprise the system what is the sign of w when you compress the airanswer a wgt0
you push a 20 kg box from an elevation of zero up a hill you exerta force of 200 n for 6 m and the box speeds up
a convertible travels down a straight level road at a slow speedof 13 kmh a person in the car throws a ball with a
a hydrogen atom initially in its ground state n 1absorbs a photon and ends up in the state for which n 3a what is the
a girl leaves a physics classroom and walks 10m north to a drinking fountain then she turns and walks 30m south to an
a drop of water on a countertop reflects light from a flower held330 cm directly above it the flowersdiameter is 210 cm