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Chapter 1: Q8CQ (page 32)
When is it necessary to use relativistic quantum mechanics?
In Physics, relativistic quantum mechanics is used for explaining the motion of those systems that have a size which is comparable to that of a hydrogen nucleus and are travelling at speeds comparable to the speed of light.
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Calculate the approximate number of atoms in a bacterium. Assume that the average mass of an atom in the bacterium is ten times the mass of a hydrogen atom. (Hint: The mass of a hydrogen atom is on the order of 10-27kg and the mass of a bacterium is on the order of 10-15kg.)
Approximately how many atoms thick is a cell membrane, assuming all atoms there average about twice the size of a hydrogen atom?
If two different theories describe experimental observations equally well, can one be said to be more valid than the other (assuming both use accepted rules of logic)?
A can contains 375 mL of soda. How much is left after 308 mL is removed?
Does the second law of thermodynamics alter the conservation of energy principle?
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