topic 4 Flow rate and viscosity

Question 1

Non-viscous vs viscous

Answer 1

Non-viscous - Thin

viscous - thick

Question 2

what is the property that describes a liquids thickness

Answer 2

viscosity

Question 3

why is it more difficult to imagine the viscosity of gases

Answer 3

Because you cant see or feel it so it is hard to know how “thick” it is.

Question 4

why is viscosity important in foods

Answer 4

Because is a food has the wrong viscosity like if its to runny or too thick it will not taste good. eg. ketchup or soup.

Question 5

why do water particles slip by each other easier than oil particles.

Answer 5

Because oil particles have more internal friction than water particles meaning they do not flow past each other as easily.

Question 6

warm liquids flowing vs cold liquids flowing

Answer 6

so warm liquids flow faster because the the attractive forces between the particles decrease.
cold liquids flow slower because they have more internal friction.

Question 7

internal friction

Answer 7

internal friction can be caused by things like the shape of the particle or the size of the particle.

Question 8

do gasses flow easier than liquids

Answer 8

yes

Question 9

viscosity of a gas

Answer 9

the viscosity of a gas increases as it is heated and decreases when it is cooled. Temperature has the opposite effect on the viscosity of gasses as on liquids

Question 10

viscosity of a liquid.

Answer 10

The viscosity of a liquid decreases as it is heated and increases as it is cooled.

Question 11

two materials with a low viscosity and two materials with a high viscosity.

Answer 11

materials with a low viscosity- water, oil

materials with a high viscosity- sirup, honey

Question 12

factors influencing viscosity of gasses

Answer 12

1. particle size
2. particle shape
3. internal friction
4. temperature