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the speed of sound in helium is 1010 mssuppose you use a tuning fork with a frequency of 522 hz what would be the
a carnot engine operates with an efficiency of 250 when the temperature of its cold reservoir is 263 k assuming that
a circularwire loop of radius 200 cm carries acurrent of 290 a it is placed sothat the normal to its plane makes an
solutions of sulfuric acid and lead ii acetate react to form solid lead ii sulfate and a solution of acetic acid530g of
an atomic emission spectrum of hydrogen shows the following three wavelengths 1215 rm nm 1026 rm nm and 9723 rm nm
the single proton that forms the nucleus of the hydrogen atom has a radius of approximately the hydrogen atom itself
three capacitors in series with capacitance 30micro farads50 and 60 are connected in series to a 210v independent
a person is making homemade ice cream she exerts a force ofmagnitude 22 n on the free end of thecrank handle and this
a heat engine operates in a carnot cycle between reservoirs oftemperatures 1000 k and 400 k it is found to discharge 20
an engine is used to lift a 2700 kg truck to a height of 30 mat constant speed in the lifting process the
ten moles of ideal gas in the initial state p110atm t1300k are taken round the following cyclea reversible change of
a neutron star is a stellar object whose density is about thatof nuclear matter suppoe that the sun were to collapse
assume that a gold nucleus has a radius of 623 fm and analpha particle has a radius of 180 fm what energy must an
the decomposition of phosphine ph3g to p4 g and h2 is first order with rate constant of 11 min-1a how long will it take
a woman stands in an elevaor that has a constant upwardacceleration while the elevator travels upward a distance of180m
a 500g bullet is fired horizontally into a 120kg wooden block resting on a horizontal surface the coefficient of
what is the minimum energy needed to create a electron-positronpair when the photon collides with an electron i know
calculate the dipole moment of nacl given a bond length of 0236nm and using the charge of an electron for q a find the
at equilibrium the concentration of an acid in solution is 250mm the ph of that solution is 425 assuming that there are
an iceboat of mass 100 kg is at rest on a frictionless frozenlake when a sudden wind exerts a force fwind ofmagnitude
a force f of magnitude 204 n is applied to a block of mass100 kg in the opposite direction to the normal force on an
draw a chair conformation of cyclohexane with one ch3ch2 group and one ch3 group that fits in the description a
the activation barrier for an uncatalyzed reaction is estimated to be 17 kcalmol the activation barrier for the
the active site of an enzyme can perturb the pkas of amino acid side chains such that they are raised or lowered from
the following question is offered in anticipation of our chapters on metabolism assuming that the average weight of an