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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
a truck covers 400 m in 735 s while uniformly slowing down to a final velocity of 340 msa find the trucks original
methane and oxygen react to form carbon dioxide and water what mass of water is formed if 32 g of methane reacts with
you break a piece of styrofoam packing material and it releases lots of little spheres whose electric charge makes them
for a certain experiment r-140a vapor is contained in a sealed glass tube at 20 degrees celcius we want to know the
a metal strip 20 cm wide and 01 cm thick carries a current of 24 a in a uniform magnetic field of 24 t as shown below
a reverse osmosis unit is used to obtain drinkable water from a source that contains 0570 g nacl per liter what is the