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a 130gram meter stick is perpendicular to a rough verticalwall because of a 20meter string attached to the wall and the
an electron enters a magnetic field of 079 t with avelocity perpendicular to the direction of the field at what
two hockey pucks of equal mass one red and one blue are involvedin an elastic collision the red puck is initially at
an airplane has an effective wing surfacearea of 10 m2 that is generating the lift force inlevel flight the air speed
the figure shows a 170 g uniform rod pivoted at one endthe other end is attached to a horizontal spring the spring
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
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
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
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
a fast measured pitched baseball left the pitchers hand at aspeed of 400 ms the pitcher was incontact with the ball
an 774-kg climber is scaling thevertical wall of a mountain his safety rope is made of nylon thatwhen stretched behaves
consider a balloon containing hydrogenmolecules at room temperature 20degc and atmospheric pressureif the balloon has a
a weather balloon filled with helium gas has a volume of273 m3 and pressure 14 105 pa at the earths surface where
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
in rlc circuit the sum of the magnitudes of the voltages across the the three components was always greater that the
a satellite moves in a circular orbit around earth at a speedof 5478 msa determine the satellites altitude abovethe
a wheel is spinning at 16 rads itundergoes an angular acceleration of 26rads2 until it reaches an angular velocity
the wave function for awave on a taut string is given below where x is in metersand t is in seconds yx t 0340 m