Newton’s law of cooling is a special case of
1. Wien’s displacement law
2. Kirchoff 's law
3. Stefan’s law
4. Planck’s law.
1. a
2. b
3. c
4. d
A hot liquid is kept in a big room. The logarithm of the numerical value of the temperature difference between the liquid and the room is plotted against time. The plot will be very nearly
1. a straight line
2. a circular arc
3. a parabola
4. an ellipse.
A body cools down from \(65^\circ \text{C}\) to \(60^\circ \text{C}\) in \(5\) minutes. It will cool down from \(60^\circ \text{C}\) to \(55^\circ \text{C}\) in:
1. | \(5\) minutes |
2. | less than \(5\) minutes |
3. | more than \(5\) minutes |
4. | less than or more than \(5\) minutes depending on whether its mass is more than or less than \(1\) kg |