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a copper rod has a length of 12 m and a cross-sectional area of40 x10-4 m2 one end of the rod is incontact with boiling
a wheel is freely rotating at 850 revmin and has a mass of 275 kg and a radius of 7 m if the wheel can be stopped in 7
four point charges have equl magnitudes three are positiveand one is negative they ae fixed in place on the
a very large thin plate has uniform surface charge density sigmatouching it on the right is a long wide slab of
a swimmer wears a heavy belt to make her average densityexactly equal to the density of water her mass including
in a typical television or in an older computer picture tube crtthe electrons that strike the screen to form an image
a train is traveling up a 32deg incline at a speed of 360ms when the last car breaks free and begins to coast how long
a nonrefelctive coating n143 covers the glass n152 ofa camera lens assuming that the coating prevents reflection
in a particular television picture tube the measured beamcurrent is 560 microa how many electrons strike the screen
calculate the density of a bar of gold with a length of 10 cm a width of 9 cm a height of 6 cm and a mass of 873
the ratio rxrt of the radius of an unknown nucleus azx to a tritium nucleus 31t is rxrt 110 both nuclei contain the
in a mall a shopper rides up an escalator between floors at the top of the escalator the shopper turns right and walks
two protons are moving directly toward one another when they arevery far apart their initial speeds are 21 106 ms what
what is the energy in ev of a a 100 mhz radio-frequency photon b a visible light photon with a wavelength of 500 nm
the acceleration of a particle along an x axisis a 70twith t in seconds and a inmeters per second squared at t 30 s
a 10-m-by-14-m house is built on a 12-cm-thick slab of concrete what is the rate of heat loss through the slab if the
a diffraction grating with 504 linesmm is illuminated with light of wavelength 305 nm what is the angular separation
a cable is lifting a construction worker and a crate asthe drawing shows the weights of the worker and crate are915 and
a sled of mass m is given a kick on a frozenpond the kick imparts to it an initial speed of 200ms the coefficient of
the coils of a motors rotor have resistance of 20 omega when the motor runs at full speed powered by 115v linevoltage
a parallel-plate capacitor is made by placing polyethylene 23 between two sheets of aluminum foil the area of
two conductors insulated from each other are charged by transferring electrons from one conductor to the other after
a particle is projected with a velocity of 900ftsec at anelevation of 60 degrees to the horizontal from the foot of a
a steel beam 10m long is installed in a structure at20oc what are the beams changes in length at thetemperature
in a simple model of the hydrogen atom theelectron revolves in a circular orbit around the proton with aspeed of 11 x