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if an increase in global temperatures were to cause a melting of the polar ice gaps which of the following best
an 91kg man drops from rest on adiving board 30m above the surface of the water and comes to rest055s after reaching
a rocket which has a rest mass of 235000 kg including186000 kg of fuel is sitting at rest in space when this fuel is
you are driving home from school steadily at 95 kmh for 130 km itthen beins to rain and you slow to 65 kmh you arrive
a 70 kg box is pulled to the left by a 405 n force at an angle of30 degree to the horizontal the coefficient of kinetic
a 3kg ball is attached to a 25 m long rope if the ball isswung in a horizontal circle at 10 ms what is the tension in
a car travels at an average speed of 30 ms for 5 km if thecar traveled at 35 ms for the first 3 km at what speed did it
a 2 kg block is released from the top of a curved incline in theshape of a quarter of a circle radius r the block then
a 50-kg dancer stands on her toes during a performance with foursquare inches in contact with the floor what is the
if a violin string vibrates at 440 hz as its fundamental frequency what are the frequencies of the first four
a person rides up a liftto a mountain topbut the persons ears fail to pop-that isthepressure of the inner ear does not
a ball is thrown vertically upward with aspeed of 153 ms from a point 421 m above the ground calculate the time in
a 174 g sample of a compound that contains only carbon and hydrogen was burned in oxygen and 528 g of co2 and 270 g of
you want to build a grandfather clock with a pendulum that has one second between its tick swinging to and its tock
calculate the concentration of permanganate when 1g of potassium permanganate is dissolved in 50ml of
the gravitational force between two electrons 100 m apart is542x10-71 n find the mass of an
it takes a force of 80n to compress the spring of a toy pop gun 02m to load a 150kg ball with what speed will the ball
compare the rate of effusion of nh3 with that of n2 at the same temperature and pressure compare the time required for
aqueous ammonia solutions are weak bases they are obtained by bubbling ammonia gas in water if 845 ml of gas at 100 atm
if 1875 mol of helium gas is at 100c and a gauge pressure of0350 atma calculate the volume of the helium gas under
a 250g bullet traveling at a speed of 425 ms strikes a wooden block of a ballistic pendulum the block has a mass of
if 50l of nitrogen at 12degc and 130atm pressure reacts with the same volume of hydrogen at the same temperature and
a boy has a 100-g stone he places it in a leather pouch attachedto the end of a 1-meter leather thong he whirls the
ammonia is kept in a cylinder with a movable piston at 25degc and 250atm what is the pressure in the cylinder if the
an object is thrown straight up with an initial velocity of 46msand an acceleration of gravity of 98 find the distance