Correct answer
D. Specific gravity
Explanation
The correct answer is Specific gravity.
A metal ball of radius 0.1 m at a uniform temperature of 90°C is left in air at 30°C. The density and the specific heat of the metal are 3000 kg/m3 and 0.4 kJ/kg.K respectively. The heat transfer co-efficient is 50 W/m2.K Neglecting the temperature gradients inside the ball, the time taken (in hours) for the ball to cool to 60°C is________?
Which of the following rock favors petroleum formation?
“The total volume occupied by a gaseous mixture is equal to the sum of the pure component volumes”. This is the ________ law?
Pick out the wrong statement?
The friction factor for turbulent flow in a hydraulically smooth pipe________?
The kinetic energy of gas molecule is zero at________?