Question

Give at least two practical examples where knowledge of viscosity is important?

Answer 1

The practical examples i would suggest are:
Try pouring palm oil into a container when thick and when heated, when heated the viscosity is higher than when cooled
Try starting your car in winter and summer, during the winter the viscosity of the engine oil is very high making it difficult for the car to start but reverse is the case during summer

Answer 2

In oil cars and in cosmetics

Step-by-step explanation:

In oil cars, viscosity is important because at different kilometers the viscosity of car oils need to be less, in that way the engine can work better.

In cosmetics, if you want to take off the color of your face, you need some products to clean it. In that case, viscosity in products is important, if you use crayon like cosmetics, you need a clean product with higher viscosity.