A Granular Substance Such as Sand Naturally Settles into a Cone-Shaped

question 16

Multiple Choice

A granular substance such as sand naturally settles into a cone-shaped pile when poured from a small aperture.Its height depends on the humidity and adhesion between granules.The angle of elevation of a pile, θ, is called the angle of repose.If the height of a pile of sand is 11 feet and its diameter is approximately 34 feet, determine the angle of repose.Round answer to nearest degree.

• A)29^o
• B)30^o
• C)31^o
• D)32^o
• E)33^o

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