With the increase of temperature viscosity.
Correct answer: B. Decrease
- A. Increase
- B. Decrease
- C. Remain same
- D. Doubles
Explanation
Viscosity is a measure of a fluid's resistance to flow. In general, as the temperature of a substance increases, its molecular motion and kinetic energy also increase. In liquids, higher temperatures lead to weaker intermolecular forces, allowing molecules to move more freely and reducing the resistance to flow. As a result, the viscosity of most liquids tends to decrease with an increase in temperature. This behavior is more pronounced in liquids with stronger intermolecular forces at lower temperatures.
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Fluid flow is described through speed, pressure and density, including steady flow and the equation of continuity for conserving mass. Bernoulli's equation relates pressure, speed and height, while fluid drag and terminal velocity explain why a falling object eventually moves at constant speed when drag balances its weight.
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