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can someone please describe the photoelectric effect how did einsteins explanation of the photoelectric effect further
a 62 cm diameter pipe gradually narrows to 40 cm when water flows through this pipe at a certain rate the gauge
a 13 cm radius air duct is used to replenish the air of a room 94 m 45 m 50 m every 10 min how fast does air flow in
three forces given by f1nbsp -200i 200j n f2nbsp 500i - 300j n and f3nbsp -450i n act on an object to give it an
a 3 mg bullet is fired from a 1 kg musket with a velocity of 3000 ms what is the resulting velocity of the
compare the charge distribution on a flat surface compared to a curved surface and explain why these distributions
a passenger on a train hears a sound with a frequency of 496 hertz as the train approaches a bell on a trackside safety
a car horn produces a sound with a frequency of 400 hz the horn is sounded while the car is moving down the street in
a 047 kg piece of wood floats in water but is found to sink in alcohol specific gravity 079 in which it has an
1 there are two charges q1 of charge 2 muc and q2 of charge 5 muc that are located a distance d apart which charge
a steel piano wire 0918 m long has a crosssectional area of 000856 cm2 when under a tension of 142 n how much does it
gamma rays gamma-rays are high-energy photons in a certain nuclear reaction anbspgamma-ray of
a geiger counter registers a count rate ofnbsp4800nbspcounts per minute from a sample of a radioisotopenbspeight
a ball is attached to a horizontal cord of lengthnbsplnbspwhose other end is fixeda if the ball is released what will
a 95th percentile male is holding a 20 lb load in his outstretched arm in 90deg abduction what is the reactive torque
an elite tour de france cyclist can maintain an output power of 450 w during a sustained climb at this output power how
you drop two balls from a tower one of a mass m and the other of mass 2m just before they hit the ground which ball if
calculate the work done by an 85kg man who pushes a crate400m up a ramp that makes an angle of 20deg with the
given g 667259 times 10-11 nm2kg2 a planet is orbiting a star calculate the mass of the star using the fact that the
find the average acceleration of the orange ball as it falls through the first 010nbspm remember that the motion is
suppose an electron with energy of 80 ev enters a region where there is a potential well of depth -20ev calculate its
what does de broglie waves and electromagnetic waves have in common which differentiate them from other
find the binding energy mev for radium-226 atomic mass 2260254 u the mass of a proton is 1007276 u and the mass of an
how many different sets of quantum numbers are possible for an electron for which n1 n2 n3 n4 amp n5 check your results