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a gymnast falls from the high bar and lands on a 10 cm thick gymnastics mat the gymnast strikes the back of his head
a brass rod 250 cm long and 1 cm in diameter is welded end to end to a copper rod 250 cm long and 050 cm in diameter if
for a certain process at 25 degrees c deltag -24 kj and deltah 12kj calculate deltas for the
to test the impact performance of a 10 cm thick gymnastics mat a 20 kg cylindrical mass is dropped onto the mat from a
for a particular chemical reaction deltah -55kj and deltas -25jk under what temperature condition is the reaction
a a 111 kg mass is at the center of a uniform spherical shell of mass 109 1020 kg and radius 107 106 m find the
why is the following not a redox reaction is it because it forms a solid what are the charges for each i got this wrong
a monatomic ideal gas expands from 100 m3 to 25 m3 at a constant pressure of 25 x 105 pa find the change in internal
a student holds a tuning fork oscillating at 256 hz he walks toward a wall at a constant speed of 120 msa what beat
a 14 kg block slides on a plane inclined at 37 degrees to the horizontal axis the coefficient of friction between the
the number of radioactive nuclei present at the state of an experiment is 278e15 the number present twenty days later
an old tablet of vitamin c weighed 1022 g it was dissolved in 500 ml water and a 25 ml aliquot of this solution
an automobile is sliding down an icy road which is inclined at a 15 degree angle the mass of the car is 1500 kg assume
water 1000 kgm3 is flowing smoothly through a pipe of diameter of 50 cm at a speed of 025 ms the pipe bends upward
there is a region with a constant magnetic field 52t the magnetic field is directed out of the page a conducting rod
suppose a projectile is to be fired from the floor onto a table 11 meters high that stands 92 centimeters from the
a 100 kg block of ice at 0 c and 100 atm melts completely to water at 0c calculate the change of the etrophy of the ice
a 45- kg box of books is pulled up a 366- m-long inclined plank to a height of 14 m a force of 221 n parallel to the
a refrigerator does 180 kj of work while moving 115kj of thermal energy from inside the refrigerator what is its
two adjacent natural frequencies of an organ pipe are found to be 840 hz and 910 hza calculate the fundamental
the suns intensity at the distance of the earth is 1370 wm2 30 of this energy is reflected by water and clouds 70 is
a spacecraft orbits an unknown planet at a distance of 52 x 107 m from its center the period of its orbit is 52 hours
a cubical box 20cm on a side is constructed from 15cm -thick concrete panels a 100 w lightbulb is sealed inside the
22g of nitrogen gas at stp are pressurized in an isochoric process to a pressure of 30atm a what is the final
a find the speed of a satellite moving around the earth in a circular orbit that has a radius equal to three times the