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a laser beam is traveling through an unknown substance when it encounters a boundary with air the angle of reflection
the right-side rearview mirror of mikes car says that objects in the mirror are closer than they appear mike decides to
a half-cell that consists of a copper wire in 100 m cuno3 solution is connected by a salt bridge to a half cell
use standard reduction potentials shown below to calculate the potential of a nickel-cadmium cell that uses a basic
an open-open organ pipe is 842 cm long an open-closed pipe has a fundamental frequency equal to the third harmonic of
air is 21 mole percent oxygen that is 021 atm oxygen at 1 atm suppose the ph of the water is 528 and that the
a guitar string with a linear density of 20 gm is stretched between supports that are 60 cm apart the string is
for the above current at 301 v how much electrical energy in kw-hr is consumed in the production of 1 kg of aluminum a
the volume of an ideal gas is increased from 1 m3 to 2 m3 while maintaining a constant pressure of 1000 pa 1 pa 1 nm2a
the electrolysis of molten a12o3 at 980 ordmc is used to produce metallic aluminum a current of 777 a is used in the
a 704 g ice cube floats in the arctic sea the temperature and pressure of the system and surroundings are at 1 atm and
a nail gun fires a nail into a piece of wood the nail is going a velocity of 90 ms right before entering the wood the
the solvay process is an industrial method for preparing baking soda in the process co2 nh3 h2o and nacl react to
a 1967 kennedy half-dollar has a mass of 1150 x 10-2 kg the coin is a mixture of silver and copper and in water weighs
if the rms electric field of this light is 160nc at a distance of 130m from the bulb what is the average total power
a nuclear power plant operating at 400 efficiency produces 1122 mw of usable power in 100 year and consumes 115times106
a 1n apple which is 5 m from the ground breaks from its stem and falls to the ground when it has fallen a distance of 2
potassium metal reacts with water to give potassium hydrozide and hydrogen gas if 500 ml of hydrogen gas is produced at
a 46 gram golf ball is hit and launched at 1944 kmhr at 30 degrees above the horizontal with no air-resistance the ball
solid potassium nitrate is decomposed by heating to give potassium nitrite and oxygen gas if 100g of potassium nitrate
a 1750-g sample containing potassium hydrogen carbonate is decomposed by heating if the mass loss is 0271g what is the
the bunker hill monument is a 67 m tall granite obelisk that contains 294 steps if it takes a 735n person 15 minutes to
the average human body contains 500 l of blood with a fe2 concentration of 140x10-5 m if a person ingests 700ml of 1100
fumaric acid is an organic substance widely used as a food additive its elemental composition is 414 c 35h and 551 o
at canobie lake park nh the starblaster ride launches riders straight up into the air with a launch speed of 30 ms and