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a gas company in massachusetts charges 250 for 150ft3 of natural gas ch4 measured at 200 degrees celcius and 100 atm
a light fixture of 100n hangs from a verticalchain that is tied to two other cables that are fastened to asupport both
how much heat in kcal must be added to 068 kg of water atroom temperature 20 c to raise its temperature to 39 ckcala
determine the lime cao and soda ash na2co3 dose mgl as caco3 to soften the following water to a final hardness of 900
potassium metal k reacts violently when added to water according to the balanced equation 2k 2h2o--gt2kohh2 how many
say you have a 10 kg book sitting on a table you pick that book upand place it 3 m below on the ground what is the work
a loop of wirein the plane of the floor has a clockwise current of 778a the radius of the loop is 197cma use the biot
an astronomical telescopeuses a diverging lens as the eyepieceand a converging lens as the objectivea converging lens
a charged particle moves through a velocity selector at a constantspeed in a straight line the electric field of the
a copper wire of length 05 cm is in a magnetic field of 20 t if it has a mass of 10 g what is the minimum current
a spring is undergoing simple harmonic motion the points y a0 and y -a0 are the endpoints of thesprings motion let y
a toaster uses a nicrhrome heating wire when the toaster isturned on at 20o c the initial current is 15a a few seconds
the co2 generated occupies a volume of 0800 l at 124 atm and 26 degrees celsius what is the mole percent of na2co3 in
a rock is on a slope at an angle of 345degree with respect to the horizontal the mass of the rock is327 kg1 what is the
how many grams of potassium fluoride kf can be produced from the reaction of 923 g of potassium with 555 g of fluorine
a commuter train blows its horn as it passes a passenger platformat a constant speed of 400 ms the horn sounds at a
an ideal gas has its pressure cut in half slowly while being kept in a container with rigid walls in the process 260 kj
a 75 kg window cleaner uses a19 kg ladder that is 51 m long he places one end on the ground22 m from a wall rests the
an ideal gas expands isothermally performing 41 x 103j of work in the process calculate the heat absorbed during this
write the reaction equations for the acid-catalyzed dehydration of the following alcohols showing all the possible
a childs helium-filled balloon escapes at sea level and18oc when it reaches an altitude of 3800 m where thetemperature
what is the molar concentration of chloride ions for each of the following solutions assume all these ionic salts are
a 30 kg girl and a 50 kg boy face each other on friction-free roller skates the girl pushes the boy who moves away at a
a 304 muf capacitor and a 784 muf capacitor are connected in series across a 170 v battery what voltage would be
oftern solutions can be hazardous in ways that are not necessarily related to ther acidity of basicity briefly comment