A Barn Is an Atomic Unit of Area Equal to 10^-28

question 31

Multiple Choice

A barn is an atomic unit of area equal to 10^-28 m².What is the surface area of the Earth expressed in units of barn? Assume the Earth is a sphere with a radius of km.(The surface area of a sphere is 4πr².) ​

• A)​5.12 × 10⁴² barn
• B)​5.12 × 10^-20 barn
• C)​5.12 × 10³⁶ barn
• D)​5.12 × 10^-14 barn
• E)​5.12 × 10³⁰ barn

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