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an object with total mass mtotal 156 kg is sitting at rest when it explodes into three pieces one piece with mass m1
a man walking on a tightrope carries a long a pole which has heavy items attached to the two ends if he were to walk
a cylinder contains a mixture of helium and argon gas in equilibrium at a temperature of 240 c boltzmanns constant is
a block of mass 014 kg is placed on a vertical spring of constant 5723 nm and pushed downward compressing the spring
cobalt oxide coo is a largely ionic compound what coordination number and crystal structure would you expect for this
the iron content of iron ore can be determined by titration with standard kmno4 solution the iron ore is dissolved in
the heat generated in this reaction helps melt away obstructions such as grease and the hydrogen gas released stirs up
a 1000g sample of red phosphorus powder was burned in air and reacted with oxygen gas to give 2291g of phosphorus oxide
a pendulum consists of a mass m 0120 kg hanging from a flexible string of length l the string is very thin very light
what is the maximum number of electrons in an atom whose highest-energy electrons have the principal quantum number
the speed of sound in air is 344 ms at room temperature the lowest frequency of a large organ pipe is 30 s-1 and the
a hoop and a disk both of 072- m radius and 50- kg mass are released from the top of an inclined plane 30 m high and 71
a stereospecific reaction is a reaction in which each of two stereoisomers of a starting material yields a particular
a car travels along a straight stretch of road it proceeds for 157 mi at 55 mih then 222 mi at 49 mih and finally 376
a buffer solution is prepared by adding 020 mole of nh3 and 030 mole of nh4cl to enough h2o to make one liter of
a playground merry-go-round has a disk-shaped platform that rotates with negligible friction about a vertical axis the
calculate the ph of the buffer prepared by mixing 350ml of 015m hc2h3o2 with a 250ml of 010m nac2h3o2 ka for hc2h3o2
find the de broglie wavelength of an oxygen molecule of average kinetic energy in air at a temperature of 2260 k the
a uniform 215- kg spinning disk with a radius of 0233 m is brought to rest by a brake-pad pressed against the side 0149
an amount of an ideal gas expands from 105 l to 223l at a constant pressure of 10atm then the gas is cooled at a
the pressure-volume graph shows an engine cycle where the working substance is an ideal monatomic gas 53 the process
what concentration of monobasic and dibasic sodium phosphate should be used to get ph
air streams horizontally past a small airplanes wings such that the speed is 620 ms over the top surface and 520 ms
what is the ionization constant of an acid if the hydronium ion concentration of a 0500 m solution is 170 x 10-4
during a lunar eclipse the moon earth and sun all lie on the same line with the earth between the moon and the sun the