Summary
Summary Questions & Answers to Chapter 7.3 Nelson Science Grade 9
Incredibly detailed questions and answers to textbook Nelson Science for 9th grade. They're for chapter 7.3 from questions 1-5.
[Show more]
Seller
Follow
Content preview
Chapter 7.3 Q & A1. (a) In your own words, define “flow rate” and “viscosity.”
The flow rate of a fluid at how quickly it’s able to pass a certain point in a given amount of time. It’s
the term used to describe the speed of a fluid. Viscosity is when we are referring to the thickness of a
fluid, or rather, its resistance to flow.
(b) Describe the relationship between flow rate and viscosity.
Flow rate refers to volume of a fluid and how fast it can move past a certain point in a given amount of
time. Viscosity is basically the term we use opposed to flow rate. Viscosity is used to talk about the
resistance of flow, or thickness. The relationship between them is like the fast and slowness of a fluid.
They both are terms used to describe a certain factor of a fluid that has to do with either volume or
thickness/speed.
2. In your own words, define “cohesion” and “surface tension.”
Cohesion talks about the force of attraction between the particles of a substance. A thicker fluid will
have a slower rate, and will most likely contain particles with greater cohesion. Surface tension refers to
the cohesion of particles on a liquid’s surface. It’s a strong attraction among particles that form the
surface of a liquid.
3. Use the term “viscosity” to explain how wetting agents are used to help fight fires.
When wanting to fight against fires with water, you would want less cohesion in the water. If the
viscosity of the water is lower than it usually is, it would hit the tree’s with fire first and it would allow
for the water to fight the fire faster. It would also spread amongst the trees faster.
4. (a) How does adhesion affect flow rate?
Adhesion is the force of attraction between particles of a fluid and particles of other substances.
(b) Give an example in real life that shows adhesion at work.
When you drink milk out of a cup, some particles will stick to the glass because of adhesion. Adhesion
being the force of attraction between the milk and the side of the glass.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller nurmohamednegin. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for CA$4.76. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
79976 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now