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light travels at a speed of about 30 108 msa how many miles does a pulse of light travel in a time interval of 01 s
the concentrationof the alkane c20h42 fm 28255 in a particular sample in rain water is 02ppb assume that the density of
show the reaction mechanism when 2-methyl-2-butanol sulfuric acidh2so4 and water are in a
a copper cus electrode is immersed in a solution that is 100 m in ammonia nh3 and 100 m in tetraamminecopperii cunh342
plants absorb light from the sun and convert the light into chemical energy which drives the reaction that produces
capacitors c1 565 microf and c2 275 microf are charged as a parallel combination across a 250 v battery the
the current indoor world record time in the 200-m race is 1992 s held by frank fredericks of namibia 1996 while the
a human being can be electrocuted if a current as small as 50 ma passes near the heart an electrician working with
a wire 251 m long and 600 mm in diameter has a resistance of 150 m a potential difference of 280 v is applied between
a motorist drives north for 360 minutes at 670 kmh and then stops for 150 minutes he then continues north traveling 130
a pintildeata of mass 350 kg is attached to a string tied to a hook in the ceiling the length of the string is 078 m
the cheetah can reach a top speed of 114 kmh 71 mih while chasing its prey in a short sprint a cheetah starts from rest
a tortoise can run with a speed of 011 ms and a hare can run 20 times as fast in a race they both start at the same
a new record for running the stairs of the empire state building was set on february 3 2003 the 86 flights with a total
a 900 bullet has a speed of 110 kms1 what is its kinetic energy in joules2 what is the bullets kinetic energy if its
a tennis player tosses a tennis ball straight up and then catches it after 165 s at the same height as the point of
a block is projected up a frictionless inclined plane with initial speed v0 144 ms the angle of incline is 458dega
at 46 degrees celsius a sample of ammonia gas exerts a pressure of 53 atm what is the pressure when the volume of gas
a magnetic field is oriented at an angle of 43 to the normal of a rectangular area 62 by 59 if the magnetic flux
children in a tree house lift a small dog in a basket 480 up to their house if it takes 221 j of work to do this what
when you calculated k in the rate equation for the reaction of kmno4 solution and h2c2o4 solution you assumed k had the
nichrome wire of cross-sectional radius 0754 mm is to be used in winding a heating coil if the coil must carry a
a 01225-g sample of solid magnesium is burned in a bomb calorimeter that has a heat capacity of 1769 jdeg c the
an object moves with constant acceleration 420 ms2 and over a time interval reaches a final velocity of 118 msa if its
a sample of pure calcium fluoride with a mass of 150 g contains 770 g of calcium how much calcium is contained in 450 g