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platinum has a work function of 64 ev radiation with wavelength 150 nm and intensity 13 wm2 is directed at a platinum
the broadcast antenna of an am radio station is located at the edge of town the station owners would like to beam all
assume a gliding bird is caught in an updraft so that it ascends at a steady rate in this situation which has greater
a man pushes a lawn mower on a level lawn with a force of 215n if 31 of this force is directed downward and 50w of
a beam of light in air reflects off of a piece of glass whose index of refraction is 142a what angle of incidence will
a beam of light is polarized in the horizontal direction and has an intensity i it then passes through a polarizer
a space traveler moving at a speed of 062c with respect to the earth makes a trip to a distant star that is stationary
a satellite moves in a circular orbit around earth at a speed of4000 msdecide1 the satellites altitude above the
refer to conceptual example 8 as background material for this problem the drawing shows a horizontal beam of light that
convert the units for an r-value to mks units oc m2 watt what is the thermal conductivity in mks units of styrofoam
you put an 8 cm3 block of ice the ice is at 0 oc into your 20 ocliter coke similar heat capacity as water all of the
a thermos bottle contains coffee at 95 ordmc assuming that minimal heat is lost out the top that the vacuum among the
prior to the precipitation with salt the theoretical yield of soap was dissolved in 150ml h2o at this soap
three point charges are located on the x-axis the first charge q1 100muc at x 10m the second charge q2 200muc is at
a blacksmith heats a horseshoe 25 kg iron to an average temperature of 700oc after working it on an anvil he plunges it
a distant galaxy emits light that has a wavelength of 5007 nm on earth the wavelength of this light is measured to be
a 100 mnbsp 3 container of air absorbs 5857 j of heat at a constant pressure of 100 atm air has a density of 120
a 050 kg ball that is tied to the end of a14 m light cord is revolved in a horizontal plane by the cord making a 30deg
a stopwatch is used to measure how long it takes a sprinter to run 100 meters this stopwatch measures time intervals to
at this station is a circuit containing a dc power supply in a box and a coil labeled c do not alter the circuit the
light of wavelength 650 nm is incident generally on a glass plate which rests on a second glass plate so that they
two pole-vaulters just clear the bar at the same height the first lands at a speed of 770 ms and the second lands at a
the light from a red laser pointer has a wavelength of about 600nm if this laser has a power of 027 mw what is the
an ac power generator produces 51 a rms at 3600 v the voltage is stepped-up to 100000 v by an ideal transformer and the
a narrow beam of ultrasonic waves reflects off the liver tumor illustrated in the figure below the speed of the wave is