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a sled weighs 100 n it is held in place on a frictionless 20 degree slope by a rope attached to a stake at the top of
how much heat in kilojoules is required to warm 100g of ice initially at -200circ c to steam at 110circ c the heat
used in welding metals the reaction of acetylene with oxygen has h0 -12562kj c2h2g 52 o2g ---------h2og 2co2gh0
samantha pushes a 500 n crate up a ramp 250 m in length and inclined at 100 degrees with the horizontal what potential
in the tests with sodium iodide in acetone which isomer should react faster 2-chloro-2-methylpropane 2-chlorobutane
a 700 kg ball falls from a 200m shelf just as it hits the floor what is its kinetic energy when it hits the
a home owner who lives beside a 60 hz power line decides to harvest some energy from the oscillating field the person
calculate the ph and the poh of an aqueous solution that is 0035 m in hclaq and 0095 m in hbraq at
calculate the concentration of h3o in a solution that contains 55 x 10-5 m oh at 25 degrees celsius identify the
how many grams of barium sulfate are produced if 2534ml of 01133 m bacl2 completely react given the reaction
a source of radio waves is emitted from the center of our galaxy 18 x 104 light years away 15 pw picowatts of power
a concentration cell is constructed of two hydrogen electrodes the pressure of h2 is 100 atm in each hydrogen electrode
a kid picks up a toy of mass 139g from the floor the kid lifts the toy 422cm above the floora how much work does the
the ksp of calcium carbonate caco3 is 336 times 10-9 calculate the solubility of this compound in
suppose that a fully charged lead-acid battery contains 116 l of 500 m h2so4 what will be the concentration of hso4- in
the first ionization energy of germanium is 762 kjmol upon irradiation with electromagnetic radiation of a particular
an explosion breaks an object into two pieces one of which has 15 times the mass of the other if 7800 j were released
the haber process for production of ammonia proceeds via the following reaction n2 3h2 --gt 2 nh3 what is the
a 0260 kg croquet ball makes an elastic head-on collision with a second ball initially at rest the second ball moves
a neutron collides elastically with a helium nucleus at rest initially whose mass is four times that of the neutron the
the ksp of leadii hydroxide pboh2 is 143 times 10-20 calculate the molar solubility of this
calculate the poh of a solution that contains 39 x 10-4 m h3o at 25 degrees celsius please show all your work step by
a rod of length 5m with miss per unit lengthx12 extends in the x-direction find the mass and the center of mass of the
a solution contains 0040 mole of baoh2 completely dissolved in water to give 400 ml of solution what is the ion