Answer
The 40W oil is more viscous than the 10W oil, so the ball drops faster through the latter oil. Viscosity increases as temperature decreases and vice versa. Accordingly, the 10W oil is preferred for low-temperature climates and regions, while the 40W would be utilized at high temperatures because light oils might become so mobile and lose its function. The 40W oil has the strongest intramolecular forces, since the strength is directly proportional to viscosity.
Work Step by Step
The 40W oil is more viscous than the 10W oil, so the ball drops faster through the latter oil. Viscosity increases as temperature decreases and vice versa. Accordingly, the 10W oil is preferred for low-temperature climates and regions, while the 40W would be utilized at high temperatures because light oils might become so mobile and lose its function. The 40W oil has the strongest intramolecular forces, since the strength is directly proportional to viscosity.
