Sigmarus

How does refraction work(the angles of incident and refraction etc)and what's the difference between convex mirror and plane mirror?

Thanks

Basically the basics of forces.Such as effects of forces,different types of forces(frictional force etc),and pressure

Well lower secondary school in my country means 13-14 years old

I understand the first part but what if the spring balance is used to measure friction?And is there a simpler explanation for frictional force being the opposite direction of movement(Since i'm only in lower-secondary)

But thank you so much for taking the time to write these invaluable answers!

Hello.So recently i have 2 questions in mind,which are

1.How does a spring balance measure the force?

2.why is the frictional force opposite the direction of movement?

Thanks

is there any equation to show the reduction effect between coca-cola and rust?Thanks!

But ermm do you know how the process of acids and alkalis work in this removal of rust?

So im sure many of you guys know that Cola can remove rust,but im curious how does it remove it(The process).I heard its something to do with ions and how acid and alkali work?

Mm probably a bit in depth?I can't really understand it with one word :/,Thanks though:)

Hmm but what does friction have to do to affect the electrons flowing?

^Please answer it in the most basic but clearest way(Im not the best in science).Thanks alot!

Hi!So my exams are coming up and i got a few questions about what makes a chemical reaction,a physical reaction and the differences between chemical and physical properties.Thanks in advance!

Thanks alot!

So basically,i have always wondered why the water outlet tube is on top of the condenser while the water inlet tube is on the bottom.Thanks!