Why would physical science be used to study light emitted by a star?
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a. light is very pretty.
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b. light is a form of energy.
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c. stars form interesting shapes in the sky.
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d. the positions of stars control our lives.

Answer: buoyancy forceexplanation: in simple terms, the principle states that the buoyancy force on an object is equal to the weight of the fluid displaced by the object, or the density of the fluid multiplied by the submerged volume times the gravitational acceleration, g. this is also known as upthrust.