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four charges q4nc form a square 20 cm on a side what is the potential of electric field at the center of the
a ball of mass 89 g with a speed of 224 ms strikes a wall at an angle 140o and then rebounds with the same speed and
identify the principle conjugate acidbase pair and calculate the ratio between them in a solution that is buffered to
two hanging masses are connected by ropes to a 20 kg mass which sits on a frictionless table find the following
arrange the following eluents in the increasing order of their eluting power place the least powerful eluent first
a heater runs on an ac voltage of 120 v and draws a power of 44 w if this heater were run instead on a dc voltage of 90
a 21 kg block of wood rests on a long tabletop a 227 g bullet moving horizontally with a speed of 168 ms is shot into
magnesium metal reacts with hydrochloric acid to form magnesium chloride and hydrogen gas suppose we react an excess of
block a with mass 4 kg travels with speed vi3 ms on a smooth horizontal surface and collides with a stationary block b
use the worked example above to help you solve this problem an ideal gas at 236degc and a pressure 180 105 pa is in a
a 1500 ml sample of a 150 m solution of cuso4 is mixed with a 1500 ml sample of 300 m koh in a coffee cup calorimeter
a resistor with r 24 k is connected to an ac generator that operates at 60 hz with an amplitude of 41 va find the
how many moles of water are formed when 50 ml of nacl and 50 ml of naoh are combined in a coffee cup calorimeter
a 259 g mass is moving in the x-direction at 566 cms while a 223 g mass is moving in the -x-direction at 416 cms they
the enantiomeric excess of a mixture of two enantiomers is 82 with an excess of the s-enantiomer the optical rotation
a 64 kg freight car is coasting at a speed of 463 ms along a straight track when it strikes a 158 kg stationary freight
an empty 13461 kg coal car is coasting on a level track at 67 ms suddenly 4761 kg of coal is dumped into it from a
why is it not possible to measure the reduction potential of a half-reaction independently that is why must one
suppose the loop in the generator in the figure below is square and the length of each side of the loop is increased by
typically a tennis ball hit during a serve travels away at about 47 ms if the ball is at rest in mid-air when struck
what is the ph at the equivalance point of the titration of 30 ml of 02 m nitrous acid with 01 m
a 40kg child slides down a frictionless playground slide starting from rest at a height of 22 m he leaves the bottom of
an artillery shell of mass 1000 kg lying at rest on the ground accidentally detonates exploding into three pieces of
if 10 ml of 005 m naoh is added to a 20 ml solution of 01 m nano2 and 01 m hno2 what is the ph of the resultant
two loudspeakers in a plane 60 apart are playing the same frequency if you stand 140 in front of the plane of the