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consider a buffer that is 0155 m in lactic acid and 0155 m in sodium lactate what is the ph of the buffer after the
the springs of a 1400 kg car compress 40 mm when its 68 kg driver gets into the drivers seat if the car goes over a
an oak barrel with a lid of area 020 m2 is filled withwater a long thin tube of cross-sectional area 50 x10-5 m2 is
what is the fractional decrease in pressure when a barometer is raised 35 m to the top of a building assume that the
the freezing point of ethanol c2h5oh is -1146 degrees celcuus the molal freezing point depression constant for ethanol
consider the double delta-function potentialvx -alpha delta x a delta x - a where alpha and a are
when the relative humidity is 49 and the temperature is 60degc what is the partial pressure of water vapor in the
the solubility of oxygen gas in water at 25 celcius and 10 atm pressure of oxygen is 0041 gl the solubility of oxygen
two small identical conducting spheres are placed with their centers 074 m apart one is given a charge of 12 10-8 c the
a 355 ml can od diet soda contains 55 mg of sodium how many gallons of diet soda must be consumed in order to ingest 10
a proton accelerates from rest in a uniform electric field of650 nc at some time later its speed is140 x 106 msa what
the intensity levels of two people holding a conversation are 60 db and 70 db respectively what is the intensity of the
two point charges q1 590 nc and q2 170 nc are separated by 450 cma what is the electric potential at a point midway
a force of 1250n is needed to move a crateweighing 3270n up a ramp that is 455m long if the elevated end ofthe ramo is
a child sits on a rotating merry-go-round 23 m from its centerif the speed of the child is 22 ms what is the
de-orbit maneuvers are done to lower the perigee of the orbit to 60 miles or less calculate the minimum change in
a thermos contains 140 cm3 of coffee at 85deg c to cool the coffee you drop two 15-g ice cubes into the thermos the ice
a 75-kg athlete does a single-hand handstand if the area of thehand in contact with the floor is 125 cm2 what
a sprinter explodes out of the starting block with an acceleration of 4ms2 which she sustains for 3 seconds then her
a water dispenser for pets has an inverted plastic bottle when acertain amount of water is drunk from the bowl more
a nickel crystal is used as a diffraction grating for x-rays then the same crystal is used to diffract electrons if the
since each rolling wheel of a railroad train is tapered the narrow part of the wheel has a tangential speed that isa
suppose a 170-kg motorcycle has two wheels and is heading toward a hill at a speed of 300 ms assume the wheels to be
find the terminal speed of man falling through earths atmosphere ignoring linear drag and focusing on quadratic drag
if the tension in the string is increased by 14 what will be the new fundamental frequency if the original was 245 hz