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determine the length of a copper wire that has a resistance of 0172 ohms and cross-sectional area of 785 times 10-5 m2
if you were stranded on an unchartered island why would it be important not to drink salt water from the ocean what
a pendulum clock is accurate on earth where the period of its pendulum is 100 sa find its period on the moon where
a 150 kg mass attached to a spring oscillates with a period of 0365 s and an amplitude of 155 cma find the total
how is the transfer of energy different between organisms that fluoresce and those that are luminescent what are the
1 what is the molar concentration of a solution prepared by dissolving 06593 g of nacl in a 100-ml volumetric flask2
two bodies oscillate in shm with the same amplitude 790 cm and frequency but out of phase so that body a always has a
calculate the equilibrium constant kc and 25 degrees c from the free-energy change for the following reaction zn s
if 90 g of al metal react with excess hcl according to the balanced equation 2als 6hclaq----gt 2alcl3aq 3h2g what
a sample of sodium metal having a mass of 545 g reacts with excess water and the water is later evaporated what is the
what mass in grams of solid sucrose c12h22o11 would need to be added to 2000 grams of water to make an ideal solution
an electron is released to accelerate from point 1 to point 2 in a potential region the electric potentials at these
the record for the highest speed achieved in a laboratory for a uniformly rotating object was 201e3ms for a 015m long
a write balanced equations for the reactions of aqueous sodium hydroxide with hcl and with so2 in a gas trapb write
1 how many moles of oxygen are generated during the thermal decomposition of 775 g of lead iv oxide2 2 a sample of
a rod length 3 meters mass 1 kg is pinned at its end so the stick can rotate freely in a plane parallel to a tabletop a
an ideal gas is allowed to expand at constant temperature from a volume of 100 l to 500 l against a constant external
one end of a 30 cm long aluminum rod with diameter 2 cm is kept at 460c while the other end is held in water at 25c
when people exercise they shed heat to the environment by sweating and radiating suppose neither of these worksof a
a when dissolved solute and undissolved solute exist in equilibrium with each other in a solution that solution is said
four rays of light are incident on a surface of water their angles of incidence are 20 30 45 y 60 degrees calculate the
the basicity test differentiates aromatic and aliphatic amines based on their solubility in a ph 55 buffer given that
an object is placed to the left of a convex lens and on the optical axis the object is 38 cm from the lens and the
the molecular orbital theory in physical chemistry what does point symmetry mean and what does it have to do with