Castor oil at 20°C has a coefficient of viscosity 2.42 N. s/m2 and a density 940 kg/m². Calculate the terminal velocity of a
steel ball of radius 2.0 mm falling under gravity in the oil
taking the density of steel as 7800 kg/m3.
Ans: 0.025 m/sec
Chapter Base
Unit 1: Mechanics
1. Physical Quantities
FORMULAE
1. To find the numerical value of a system using another
system of units, we use

Which best describes the first law of thermodynamics as compared to the second law of thermodynamics? a. the first law describes how thermal energy is conserved but not the direction it moves. b. the first law describes the direction thermal energy moves but not how it is conserved. c. the first law describes how thermal energy can be created but not how it can be destroyed. d. the first law describes how thermal energy can be destroyed but not how it can be created.