Science

[DeiJaiVui]

A lil' help? I'm really bad at science. :( I don't understand much of this.

1. Define the term “buoyancy force”, use this to explain how ship’s float on water.
2. Explain what friction is and describe everyday situations where friction acts. Give both beneficial and negative uses.
3. Describe all ways that friction can overcome and be reduced.
4. Clearly explain the difference between terms, mass and weight. State the units each.
5. Describe Sir Isaac Newton’s discoveries that relate to forces. How did his discoveries change scientific thinking?

Thankyou.

[BraK]

Section math topic science? Something is failing here.

[DeiJaiVui]

Ooops, wrong catergoy..

[DeiJaiVui]

A lil' help? I'm really bad at science :( I don't understand much of this.

1. Define the term “buoyancy force”, use this to explain how ship’s float on water.
2. Explain what friction is and describe everyday situations where friction acts. Give both beneficial and negative uses.
3. Describe all ways that friction can overcome and be reduced.
4. Clearly explain the difference between terms, mass and weight. State the units each.
5. Describe Sir Isaac Newton’s discoveries that relate to forces. How did his discoveries change scientific thinking?

Thankyou.

[Nebula]

You can google all of these

[Daniel]

A lil' help? I'm really bad at science. :( I don't understand much of this.

1. Define the term “buoyancy force”, use this to explain how ship’s float on water.
2. Explain what friction is and describe everyday situations where friction acts. Give both beneficial and negative uses.
3. Describe all ways that friction can overcome and be reduced.
4. Clearly explain the difference between terms, mass and weight. State the units each.
5. Describe Sir Isaac Newton’s discoveries that relate to forces. How did his discoveries change scientific thinking?

Thankyou.

DeiJaiVui, you are in year 7 or 8. Some of this isn't even a part of your syllabus. Why are you learning it? :S In fact, you'll only need to know friction and buoyancy force if you choose to undertake Engineering Studies in years 11 and 12. In fact, most of this you will learn in year 10 anyway as that is a part of that syllabus :p

Sounds like homework to be honest. If I am wrong and it is a part of the course, look through your Jacaranda/Heinemann text book, and whatever notes your teachers gave you :)

[Sin]

There's a difference between knowing and understanding.

[Nebula]

You don't need a textbook to know what buoyancy and friction are. This can easily be googled and is seriously common knowledge after you're 6 years old.

[Frement]

You don't need a textbook to know what buoyancy and friction are. This can easily be googled and is seriously common knowledge after you're 6 years old.

Are you asian?

[Nebula]

No.. it doesn't take an engineering degree to know that friction is what stops stuff from rubbing together and buoyancy being the upward force of water. Maybe stuff is taught differently in different areas.

[putonajonny]

What age are you? I have no idea of the sort of detail to go into but:


1. Define the term “buoyancy force”, use this to explain how ship’s float on water.The buoyancy force is equal to the weight of water (look up Archimedes)

2. Explain what friction is and describe everyday situations where friction acts. Give both beneficial and negative uses.Friction is a force between two objects that opposes motion, benefits: breaks negative uses: loss of useful energy in a system in motion

3. Describe all ways that friction can overcome and be reduced.lubricants

4. Clearly explain the difference between terms, mass and weight. State the units each.mass (kg) is the amount of matter in an object, weight (N or kg ms^-2) is the force due to gravity on this object

5. Describe Sir Isaac Newton’s discoveries that relate to forces. How did his discoveries change scientific thinking?F = ma (an object will only change speed when a resultant force acts upon it, this change in speed will be proportional to this resultant force)

I've not completed every question, just given you a start to work from...

I am sorry if any of this is wrong, it is all off the top of my head.

[BraK]

Merged into the Science one :p

[riwu]

A lil' help? I'm really bad at science. :( I don't understand much of this.

1. Define the term “buoyancy force”, use this to explain how ship’s float on water.
2. Explain what friction is and describe everyday situations where friction acts. Give both beneficial and negative uses.
3. Describe all ways that friction can overcome and be reduced.
4. Clearly explain the difference between terms, mass and weight. State the units each.
5. Describe Sir Isaac Newton’s discoveries that relate to forces. How did his discoveries change scientific thinking?

Thankyou.
To add on to puton's ans:
1. to be precise, the weight of water displaced. Formula for calculating the upthrust is Vpg, where p (pronounced as 'roll') is the density of water.

2. Can be explained using Newton's 3rd law of motion: for every action, there is an equal and opposite reaction, and these forces acts on mutually opposite bodies.

3. Wheels works too. And of course levitation (rmb those bullet trains in Japan?)

5. Mainly the 3 laws. F=ma is only applicable when rate of change of mass is constant (which is usually the case). According to the 2nd law of motion, force is in fact directly proportional to the rate of change of momentum.

[Vinyl Scratch]

No.. it doesn't take an engineering degree to know that friction is what stops stuff from rubbing together

Friction comes from rubbing two things together, it helps stop the two moving objects, but that's not what completely stops it.

[Sin]

Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other. There are several types of friction:

Dry friction resists relative lateral motion of two solid surfaces in contact. Dry friction is subdivided into static friction between non-moving surfaces, and kinetic friction between moving surfaces.
Fluid friction describes the friction between layers within a viscous fluid that are moving relative to each other.[1][2]
Lubricated friction is a case of fluid friction where a fluid separates two solid surfaces.[3][4][5]
Skin friction is a component of drag, the force resisting the motion of a solid body through a fluid.
Internal friction is the force resisting motion between the elements making up a solid material while it undergoes deformation.[2]


Wikipedia definition ^

[Nebula]

For you, it would. Friction comes from rubbing two things together.

Lol, just no.

[Vinyl Scratch]

Let me clarify it a little. Friction come from rubbing two surfaces togeather. you know that little bit of resistance? That would be friction.

There you go.