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a spherical weather balloon os filled with hydrogen until itsradius is 3m total mass including instruments is 15kga
to recharge a 12 v battery a battery charger must move 36 x 105 c of charge from the negative terminal to the positive
a vertical spring k 305nm vibrates with amplitude of 28cm when26kg hangs from it the mass passes through the
an alpha particle a helium nucleus is traveling along thepositive x-axis at 1175 ms when it enters a cylindrical tube
power lines have a limit on the maximum size of the electric fieldthey produce in most states a maximum of 5knc at
if the breakers at a beach are separated by 40 m and hit shore with a frequency of024 hz with what speed are they
a boy with a mass of 45 kg is hangingfrom a spring with a spring constant of 180 nm with what frequency does the boy
a 34 g bullet travelling at 120ms embeds itself in awooden block on a smooth surface the block then slides toward
a soccer player kicks a rock horizontally off a 400 m high cliffinto a pool of water if the player hears the sound of
inez is putting up decorations she ties three light silkribbons together at the top of a getaway and hang a balloon
sam heaves a shot with weight 16-lb straight upward giving it aconstant upward acceleration from rest of 460 ms2 fora
a conducting sphere that carries a total charge of -6 muc isplaced at the center of a conducting spherical shell that
calculate the heat released when 400 l of chlorine gas with a density of 188 gl reacts with an excess of sodium metal
a 15 kg bass is swimming along at 25 ms when it ingests a 50 kg minnow traveling in the opposite direction at 3 ms what
a sample of 100 mol perfect gas molecules at 300k with cpm7r2 is put through a constant-volume heating to twice its
when catching a baseball a catchers glove moves by 12 cm along the line of motion of the ball if thebaseball exerts a
if 535ml of 01000 m naoh solution is needed to just neutralize excess acid after 2000 ml of 01000 m hcl was added to
a person lifts a 47 kg cement block avertical distance of 102 m and thencarries the block horizontally a distance of
are solution of the following salts acidic basic or neutral for those that are not neutral write balanced equations for
a rock is dropped from the top of a 100 - m - tall building andlands traveling at a speed of 30 ms how much energy was
the trend in second ionization energy for the elements from lithium to fluorine is not a smooth one predict which of
explain why the following reaction occured using the vocabulary cation anion ionization energy and electronegativity
write out a detailed procedure for determining the enthalpy ofreaction between citric acid h3cit and sodiumhydroxide
brazilains are quite familiar with fueling their automobiles with ethanol a fermentation product from sugarcane
calcium carbonate decomposes with heat to give calcium oxide and carbon dioxide gas if 2 mols of caco3 decompose how