GEOLOGY

EARTH SCIENCE

VOLCANOES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is the resistance of a liquid, such as lava, to flow?
A
Elasticity
B
Pyroclasticity
C
Silica
D
Viscosity
Explanation: 

Detailed explanation-1: -Viscosity is the measure of resistance of a fluid to flow. A fluid that is highly viscous has a high resistance (like having more friction) and flows slower than a low-viscosity fluid. To think of viscosity in everyday terms, the easier a fluid moves, the lower the viscosity.

Detailed explanation-2: -Point out that viscosity is a fluid’s resistance to flow. The viscosity of lava differs depending on the amount of silica in each type of lava.

Detailed explanation-3: -Similarly, if the viscosity of the blood increases 2-fold, the resistance to flow will increase 2 fold. In contrast, an increase in diameter (or radius) reduces resistance.

Detailed explanation-4: -Viscosity is the resistance of a fluid (liquid or gas) to a change in shape or movement of neighbouring portions relative to one another. Viscosity denotes opposition to flow.

Detailed explanation-5: -Viscosity can be not only a fluid’s resistance to flow but also a gas’ resistance to flow, change shape or movement. The opposite of viscosity is fluidity which measures the ease of flow while liquids such as motor oil or honey which are “sluggish” and high in viscosity are known as viscous.

There is 1 question to complete.