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an open railroad car of mass 2496 kg is coasting with an initial speed of 17 ms on a frictionless horizontal track it
sulfur-38 has an atomic mass of 380 and a half-life of 287 h how long does it take for 9999 of a sample of sulfur-38 to
two blocks of weights 450 and 830 n are connected by as massless string and slide down an inclined plane making an
because of its semiconducting properties cds is sometimes used in electronic devices the band gap energy for cds is 240
a 130 horizontal beam is supported at each end a 310 piano rests a quarter of the way from one endwhat is the vertical
how many moles of solute particles are present when 025 moles of caso4 is dissolved in
to prepare a solution of nacl you weigh out 2634plusmn002g and dissolve it in a volumetric flask whose volume is
as part of an internship in a petrochemical company you are given the task of identifying the fractions coming off the
space probes communicate with controllers on earth using radio waves suppose a probe has a radiotransmitter that
a converging lens of focal length 0187 m forms a virtual image of an object the image appears to be 0875 m from the
a beaker containing 300ml of water at 20 clesius has a 150g piece of aluminum at 50 celsius placed in it what is the
an investigator finds a fiber at a crime scene that he wishes to use as evidence against a suspect he gives the fiber
stationary l 302-m board of mass 456 kg is hinged at one end a force f is applied vertically at the other end and the
the membrane of the axon of a nerve cell is a thin cylindrical shell of radius r 10-5 m length l 042 m and thickness
the average resistivity of the human body is 5 ohmm the conducting path between two hands is approximated as a cylinder
an oscillating lc circuit has a current amplitude of 710 ma a potential amplitude of 250 mv and a capacitance of 200
two polarizers are out of alignment by 241deg if light of intensity 100 wm2 and initially polarized halfway between the
an astronaut is tethered by a strong cable to a spacecraft the astronaut and her spacesuit have a total mass of 104
a bottle at 210c contains an ideal gas at a pressure of 1264 times 103 pa the rubber stopper closing the bottle is
a 518- physics student stands on a bathroom scale in an 846- including the student elevator that is supported by a
as early as 1938 the use of naoh was sugested as a means of removing co2 from the cabin of a spacecraft according to
an air bubble has a volume of180cm3when it is released by a submarine105m below the surface of a lake what is the
a weather balloon is designed to expand to a maximum radius of17m at its working altitude where the air pressure is
word equations and balanced chemical equations for the burning of carbon and burning of
write the balanced equations for bothof the following reactions and identify the type of reaction for eachpotassium