Which event or principle CANNOT have its validity directly tested by laboratory experiment? Select one: a. the big bang theory b. the conservation of energy c. the periodicity of element properties d.

Which event or principle CANNOT have its validity directly tested by laboratory experiment?

Select one:

a. the big bang theory

b. the conservation of energy

c. the periodicity of element properties

d. the acceleration of objects due to gravity

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Which event or principle CANNOT have its validity directly tested by laboratory experiment? Select one: a. the big bang theory b. the conservation of energy c. the periodicity o…

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