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differentiate the formula for the energy density per unit frequency of a blackbody to find the value of hu at which the
the drawbridge then starts to rise and the dancer continues to stand on one leg the drawbridge stops just at the point
derive the electric potential v for a single current electrode placed at the surface of an isotropic medium the current
your radio station needs a new coaxial cable to connect the transmitter and antenna one possible cable consists of a
guns on world war ii battleships could shell targets 15 kmnbspaway find a the minimum launch speed needed to achieve
in a cathode-ray tube electrons are projected horizontally at 15x106ms and travel a horizontal distance 110cm across
an isolated conductor of arbitrary shape has a net charge of 120times10-5 c inside the conductor is a cavity within
in 1965 arno penzias and robert wilson discovered the cosmic background radiation this is the radiation left over from
a hene helium-neon laser has a beam power of 500 mw at a wavelength of 656 nm assume the beam is focused by a lens to a
the electric field of a plane electromagnetic wave is given byex 0 ey 0 ez 20 cos 06 x 1015 t ndash yc with all
the crab nebula is a supernova remnant 6500 light years away from earth records from the chinese indicate that they
a source of radio waves is emitted from the center point of our galaxy 19 x 104 light years away nine picowatts of
the place you get your hair cut has two nearly parallel mirrors 800apart as you sit in the chair your head is 250 from
the electric field intensity between two parallel plates separated by 25mm is 8000 nc how much work is done by the
calculate the force required to pull a copper ball of radius 300 cm upward through a fluid at the constant speed 600
the density of air under standard laboratory conditions is 129rm kgrm m3 and about 200 of that air consists of oxygen
two 150-v batteriesmdashwith their positive terminals in the same directionmdashare inserted in series into the barrel
a particle leaves the origin with an initial velocity v24 msx and moves with constant acceleration a-19 ms2x 32 ms2y
in a game of basketball a forward makes a bounce pass to the center the ball is thrown with an initial speed of 43 at
on a hot summer day a young girl swings on a rope above the local swimming hole figure 1 when she lets go of the rope
an astronaut on the planet zircon tosses a rock horizontally with a speed of 695 the rock falls through a vertical
a diffraction grating with 2507 x 103 linescm is used to examine the sodium spectrum a calculate the angular separation
monochromatic light is beamed into a michelson interferometer the movable mirror is displaced 036 nm causing the
two charges are fired directly at each other both charges have different masses and different initial velocities so