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you have synthesized a new compound the crude product melts at 102-106 degrees c you spend a little time purifying it
robin hood aims a 500 g arrow at a 2 kg bird perched on a tree the arrow is released with a speed of 40 ms at an angle
which of the following polymers is a condensation polymer -teflon -polystyrene - polyvinylchloride -polypropylene
what is the empirical formula of a compound that contains 494 k 203 s and 303 o by
the specific heat capacity of a material is 1150 jkgmiddotdegc the temperature of 10 kg of this solid material is
a wodden raft has a density of 05103kgm3 and dimension of 305m61m0305ma how deep does it sink into the water when
estimate the number of breaths taken by a human being during an average lifetime we estimate an average respiration
a water droplet of radius 22times102 remains stationary in the air if the downward-directed electric field of the earth
the output piston of a hydraulic press has a cross-sectional area of 020 cm2a how much pressure on the input piston is
an air-traffic controller observes two aircraft on his radar screen the first is at altitude 950 m horizontal distance
a load of 50kg is applied to a lower end of a steel rod 80cm long and 06cm in diameter how much will the rod stretch
a 2774-n force is applied parallel to a 238-degree incline to pull a 295-kg crate from rest up the incline to a final
a swimming pool has dimensions 260 m multiplied by 90 m and a flat bottom when the pool is filled to a depth of 250 m
a 60kg student carrying a 50kg school bag walks up to flights of stairs in 30 seconds to reach the library each stair
a a stone is thrown vertically upward at a speed of 2840 ms at time t0 a second stone is thrown upward with the same
a wire carrying a current is placed in a uniform magnetic field when a current of 37a flows in the wire there is a
a single force acts on a 28 kg particle-like object in such a way that the position of the object as a function of time
a 2083 gram pendulum bob on a 192 meter long string is pulled to a height above its lowest position such that it makes
part a - what volume of 225m hcl in liters is needed to react completely with nothing left over with 0250l of 0300m
a person pulls a sled for a distance of 370m along the snow with a rope directed at 20 degrees above the snow the
a hockey puck is struck with a force of 40n in an ice hockey arena assuming the ice provides a constant frictional
a 550-kg car traveling at 240 ms collides head on on with a 680-kg pick up truck what is the momentum of the car before
what volume ml of a concentrated solution of magnesium chloride 900 m must be diluted to 350 ml to make a 275 m
the fundamental and first overtone for 14n16o are centred at 187606 cm 1 and 372420 cm 1 respectively evaluate the
aqueous hydrochloric acid reacts with zinc metal to yield hydrogen gas and aqueous zinc chloride write a net ionic