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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
urease enhances the rate of urea hydrolysis at ph 8 20 degrees c by a factor of 1e14 if a given quantity of urease
a charged isolated metal sphere of diameter 10 cm has apotential of 8000 v relative to v 0 at infinity calculate the
a sample of metallic element x combines completely with oxygen gas o2 forming a metal oxide of formula xo if the amount
solutions of calcium iodide and lead nitrate are mixed together a reaction occurs where a solid forms at the bottom of