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three forces given by f1nbsp -200i 200j n f2nbsp 500i - 300j n and f3nbsp -450i n act on an object to give it an
how much kbr can be dissolved in 200 l of water at 400onbspc note that water has a density of 100 gml and there are
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 ball is attached to a horizontal cord of lengthnbsplnbspwhose other end is fixeda if the ball is released what will
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
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gamma rays gamma-rays are high-energy photons in a certain nuclear reaction a gamma-ray of energy 0381 mev million
a geiger counter registers a count rate ofnbsp4800nbspcounts per minute from a sample of a radioisotopenbspeight
a 95th percentile male is holding a 20 lb load in his outstretched arm in 90deg abduction what is the reactive torque
when doing work to a system what happens to its energy what happens to systems energy when it does
calculate the work done by an 85kg man who pushes a crate400m up a ramp that makes an angle of 20deg with the
find the average acceleration of the orange ball as it falls through the first 010 m remember that the motion is
a 20 gram sample of a radioactive isotope undergoes radioactive decay if the half life of the isotope is 45 minutes the
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
how many different sets of quantum numbers are possible for an electron for which n1 n2 n3 n4 amp n5 check your results
question 1a draw a transverse wave and label the following properties crest trough amplitude and wavelength then draw a
the nucleus contains protons and neutrons being positively charged the protons repel each other the nucleus should fly
1 according to the us department of treasury a sum of one million dollars in 100 dollar bills weighs about 22 pounds
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an x-ray with a frequency of 374 1020 hz is incident on a thin piece of metal the lower frequency x-ray on the other
why is it safe to live near a high power radio tower using 50 kw of power but dangerous to be exposed to an x-ray
as a safety precaution when working with lasers scientists wear red-colored glasses that will block all colors but red
two very thick equally-magnetized square plates of side 023m and of mass 20g are hung by threads 200 cm long from a