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a golf ball of mass 0045 kg is hit off the tee at a speed of45 ms the golf club was in contact with the ball for 50
at one time a common means of forming small quantities of oxygen gas in the laboratory was to heat kcio32 kcio33
a 18 g rifle bullet traveling 230 ms buries itself in a 36 kg pendulum hanging on a 28 m long string which makes the
00200 mole of hcl and 00200 mole of naoh react in an open calorimeter and produce 100 j of heat what is the enthalpy of
determine which of the following kinds of light contain enough energy to break chemical bonds in biological molecules
a bullet is fired horizontally with an initial velocity of 250ms from a tower that is 20 m higha calculate the time the
on a frozen pond a 116 kg sled is given a kick that impartsto it an initial speed of vo 215 ms the coefficientof
there is a 5f electron and a 5d whats the allowable combination of quantum numbers i guess what differs the two wouldnt
a 450 kg girl is standing on a 136 kgplank the plank originally at rest is free to slide on a frozenlake which is a
a tennis player receives a shot with the ball 00600 kgtraveling horizontally at 500 ms andreturns the shot with the
calculate the molality of a solution made by dissolving 340 g of nh3 in 200 x 103 ml of water mmnh3 1704 gmol dh2o
a person stands at a point 300 m in frontof the face of a sheer cliff if the person shouts how much time will elapse
positive focal lengths correspond to concave lensesconvex lensescompound lensesconvolted
1 describe the rutherfords model of the atom and compare it with the model proposed by his student niels bohr2 what is
a man drinks a bottle of beer and proposes to work off its460kj by exercising with 20 kg barbell if each lift of
if a real object is placed inside the focal point of a diverging lens the image isvirtual inverted andreducedvirtual
what is the partition coefficent of 100 mg of benzoic acid in 2ml of methylene chloride and 2ml of water and 101 mg of
a rifle with a barrel length of 610 cmfires a 100 g bulletwith a horizontal speed of 360 rm ms the bullet strikes a
two pole-vaulters just clear the bar at the same height thefirst lands at a speed of 707 ms while the second lands at
suppose the skateboarder shown in the drawing reaches a height of230 m above the right side of the semicircular ramp he
a 500 g object moving to the right at200 cms makes an elastic head-oncollision with a 100 g object that isinitially at
two gliders are positioned on an air track m1 and m2 m2 is stationary and m1 is then pushed down the track and collides
starting from rest a 57 kg block slides 24 m down a rough 300deg incline thecoefficent of kinetic friction between the
a disk of radius r and uniform surface charge density sigma liesin the xy plane with its axis coinciding with the z
a 140 kg astronaut including space suit acquires a speed of250 ms by pushing off with his legs from an 1800 kg