Three Solid Objects of the Same Material and of Equal

question 33

Multiple Choice

Three solid objects of the same material and of equal mass-a sphere, a cylinder (length = diameter) and a cube are at 500°C initially. These are dropped in a quenching bath containing a large volume of cooling oil each attaining the bath temperature eventually. The time required for 90% change in temperature is the smallest for

• A)Cube
• B)Cylinder
• C)Sphere
• D)Equal for all the three

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Definitions:

Confidence Interval

An array of numerical indicators, gleaned from sample statistics, anticipated to harbor the value of an unknown population attribute.

Sample Size

The number of observations or replicates included in a statistical sample, crucial for the validity and accuracy of an experiment.

Degrees of Freedom

The number of independent values or quantities that can vary in the analysis without violating any constraints.

Confidence Interval

A collection of values, resulting from statistical sampling, that is expected to house the value of a non-identified population parameter.