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a hydrogen atom in a certain excited state has its electron in a 5f subshell the electron drops down to the 3d subshell
suppose a star with a radius 85108 has a peakwavelngth of 688 nm in the spectrum of its emitted radiationa find the
a laser beam is incident at an angle of 25 degrees fromthe vertical onto a glass plate with index of refraction n 1488
nitrogen oxides undergo many interesting reactions in the environment and in industry given the following information
starting from rest a 24x10-4 kg flea springs straightupward while the flea is pushing off from the ground the
two newly discovered planets follow circular orbits around a starin a distant part of the galaxy the orbital speeds of
a 286 g sample of ethylene glycol a car radiator coolant loses 700 j of heat what was the initial temperature of
the net force actingon a 60-kg object is given by fx 100 - x nwhere fx is in newtons andx is in meters how much work is
calculate heat of reaction in kj per mole of khco3s for the reaction of potassium bicarbonate and hydrocholric acid
a particular engine has a power output of 600 kw and an efficiency of 210 assume the engineexpels 8500 j of energy in
a vibrating source generates a harmonic wave on a string underconstant tension if the power delivered to the string is
what is the change in internal energy in j of a system that absorbs 0524 kj of heat from its surroundings and has 0344
a fast measured pitched baseball left the pitchers hand at aspeed of 400 ms the pitcher was incontact with the ball
draw two chair conformers for each of the two isomers for trans-1-tertbutyl-3-methylcyclohexane which is more stable
an 774-kg climber is scaling thevertical wall of a mountain his safety rope is made of nylon thatwhen stretched behaves
if a molecule having an ionization energy of 1183 ev produces a photoelectron having a kinetic energy of 77697e-19 j
consider a balloon containing hydrogenmolecules at room temperature 20degc and atmospheric pressureif the balloon has a
it is recommended that we drink 8 glasses of water a day each glass of water weighs 240grams if the human body contains
a weather balloon filled with helium gas has a volume of273 m3 and pressure 14 105 pa at the earths surface where
when lcao molecular orbitals of methane ch4 are formed from the carbon 2s and 2p atomic orbitals along with the 1s
a force fthree x square ni 4nj with x in meters acts on aparticle changing only the kinetic energy of the particlea how
a spacecraft moving away from earth emits a 4306 hz signal a scientist on earth measures thesignal to be 4305 hz what
a frictionless roller coaster reaches a top speed of 50 ms atground level and then goes up a long ramp untill it comes
the headlights on a certain car are measured to be 1 m apart the diameter of the pupil in a human eye is25 mm what is