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pentane c5h12 reacts with oxygen 02 to produce carbon dioxide and water the reaction is very exothermic with delta h
a mans leg can be thought of as a shaft of bone 12m long if the strain is 13x 10-4 when the leg supports his weight by
an electron is observed traveling at a speed of 189 107 ms parallel to an electric field of magnitude 10660 nc how far
two objects with masses of 300 kg and 500 kg are connected by a light string that passes over a frictionless pulley
a 4000 g block of aluminum at t30 degrees celsius is placed in contact with a 6000 g block of iron at t 100 degrees
a force vector has a magnitude of 589 newtons and points at an angle 43o of below the positive x axis what are a the x
735 g of salt is placed into 400 ml of water and stirred thoroughlya how much salt dissolves into the waterb how much
how could you tell whether the white crystals you have are sodium chloride nacl or sodium iodide nai what precipitate
assume an asteroid has the shape of a sphere a rock sitting on the surface of the asteroid has a weight of 100 newtons
the resistance and the magnitude of the current depend on the path that the current takes the drawing shows three
one kilowatt-hour kwh is the amount of work or energy generated when one kilowatt of power is supplied for a time of
in some communities products that contain phosphates are banned from sale because of pollution of well water streams
in the figure below a nonconducting rod of length l 850 cm has charge -q -432 fc uniformly distributed along its
it is known that the electric force of repulsion between two electrons is much stronger than the gravitational
bicyclists in the tour de france do enormous amounts of work during a race for example the average power per kilogram
how many grams of barium hydroxide must be added to 237-l of distilled water to make a saturated
in a student experiment a constant-volume gas thermometer is calibrated in liquid nitrogen 196degc and in boiling
a ball is launched with an initial velocity of 249 ms at a 45deg angle from the top of a cliff that is 900 m above the
to 200 l of 100m of leadii nitrate you add 500 grams of sodium sulfide na2s being a sodium salt sodium sulfide is
a circular loop of radius 010 m is rotating in a uniform external magnetic field of 020 t find the magnetic flux
a uniform cylinder of mass m826 kg and radius r0147 m is released from rest on an inclined plane theta424 deg and rolls
a sample of tap water produces a white precipitate when treated with silver nitrate agno3 what ion is most responsible
a uniform cylindrical pulley of mass m122 kg and radius r0272 m rotates freely about a fixed horizontal axis a block
a cucu2 concentration cell has a voltage of 24v at 25 degrees c the concentration of cu2 in one of the half-cells is