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part awhat mass of carbon dioxide is present in 100 rm m3 of dry air at a temperature of 25 c and a pressure of 685
in 1986 an electrical power plant in taylorsville georgia burned 8376726 rm tons of coal a national record at that
in an em wave traveling west the b field oscillates vertically and has a frequency of 800 khz and an rms strength of
a viscous fluid is flowing in a constant cross-section horizontal pipe with a pressure difference across the pipe of 1
the ph of a 0015 m ammonia solution is 1072 what is its hydroxide-ion concentration please show worka 072 x 10-4 mb 191
a gymnast with mass m1 430 kg is on a balance beam that sits on but is not attached to two supports the beam has a
a room has two opposing walls which are tiled the remainingwalls floor and ceiling are lined with sound-absorbent
converting sunlight to electricity with solar cells has an efficiency of 15 its possible to achieve a higher efficiency
1 what is oxidation-reduction reaction balance the reaction between potassium permanganate with oxalic acid in the
calculate the concentration of each substance when mixing 400 ml of 01 m ch3cooh and 100 ml of 01 m
suppose a slide similar to der stuka is 388 meters high but is a straight slope inclined at 45deg with respect to the
a converging lens with a focal length of 179 cm and a diverging lens are placed 260 cm apart with the converging lens
calculate the heat released when 720g of steam at 131c is converted to water at 440c assume that the specific heat of
a professional golfer is examining a video of a practice swing the high-speed footage shows that his club is in contact
two people one of mass 75 and the other of mass 65 sit in a rowboat of mass 89 with the boat initially at rest the
a wheel is rotating about an axis that is in the z-direction the angular velocity is at increases linearly with time
two pucks a and b are on an air hockey table puck a is moving with an initial velocity of 55ms eastward and puck b is
for which of the following substances will the molar solubility in water be the same as that in an hcl or nh3 solution
a solar cell has a light-gathering area of 10 cm2 and produces 02 a at 08 v dc when illuminated with s 1000 wm2
to decrease the body temperature of a 66-kg person by 10 c what mass of alcohol must be evaporated from the persons
a particle of mass 0450 kg is attached to the 100-cm mark of a meter stick of mass 0125 kg the meter stick rotates on a
a machine does work at a rate given by pct2 where c 15ws2 and t is time find the work done by the machine between 15s
a hoop of mass m2 kg and radius r04 m rolls without slipping down a hill the lack of slipping means that when the
an atom in a solid vibrates at 10thz with amplitude 10pmpart a find the atoms maximum speedpart b find the atoms
the following reaction occurs in basic solutions what is the sum of the coefficients in the balanced equationmno4- nh3