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a park rangers flashlight beam strikes a lake surface the reflected ray makes a 51 angle with the normalwhat angle does
the heat of combustion of ethane c2h6 is 1560 kjmol what is the heat of combustion of ethane in kj per
although coals is a complex mixture of substances its elemntal composition can be approximated by the formula
a 65 feet tall woman wants to buy a mirror from the bookstore that is tall enought so that she can see her full figure
new ads for the toyota prius claim that it has saved over 1 billion gallons 28 x 109kg of gasoline assuming that
light hits the surface of water at an incident angle of 19deg with respect to the normal line what is the angle between
describe the effects of a catalyst on a reaction what is changed what is not include a rough sketch showing the
your friends frisbee has become stuck 19m above the ground in a tree you want to dislodge the frisbee by throwing a
a system at equilibrium contains i2 g at a pressure of 041 atm and i g at a pressure of 032 atm the system is then
a 18kg child slides down a 25m -high playground slide she starts from rest and her speed at the bottom is 18mswhat is
calculate the ph at the equivalence point for the titration of 010 m hcl with 010 m nh3 kb 18 x
a 2 kg brick is dropped from the top of a building 100 calories of heat energy is added to the brick due to the fall
find the electric field of a solid sphere of charge with the nonuniform charge density rho ar with a an overall
we used 5 different concentration levels to test the absorbtion a potato slice had to increase its weight then we had
a 23 kg box starting from rest is pushed up a ramp by a 10 n force parallel to the ramp the ramp is 20 m long and
the number of radioactive nuclei in a particular sample decreases to one-eighth of the original amount in 21 dayswhat
the change in the gibbs energy of a certain constant-pressure process as a function of temperature was found to fit the
a student is examining a bacterium under the microscope the e coli bacterial cell has a mass of 0500 where a
a person has a far point of 33 cm what power glasses would correct this vision if the glasses were placed 21 cm from
copper is electroplated from cuso4 solution a constant current of 400 amp is applied by an external power supply how
what is the magnification of an astronomical telescope whose objective lens has a focal length of 71 cm and whose
a wire of length 250 centimeters and radius 03 millimeters is stretched by hanging on a weight of 12 kilograms and the
a resonant circuit in a radio receiver is tuned to a certain station when the inductor has a value of 100 microh and
calculate the heat capacity of satan i e ni if 300g of nickel at 1000 c raises the temperature of 250g of water from