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lol, what much is there to snell's law, apart from the formula?

Yes it is.

Thanks for that I'll that in a minute. Could someone please help me with the other question please? I've been trying it for an hour and still couldn't get it. Also, how would I test/verify that I've the correct answer for these types of questions? Thanks

Let α, β, γ be the roots of x3-x2+2x-1=0. Write down an equation with roots i) α+β, β+γ, and α+γ ii)α/(βγ), β/(αγ), and γ/(αβ) Thanks

Use the 'halving the interval' method to show that one root of the question x3+2x-8=0 is approximately 1.67 Thanks

It certainly would decrease the amount of teenage pregnancy =D

I know the answer... But I was wondering if it's in the current Chemistry Syllabus, if anyone knows could they please comment? Thanks

Hello, Is this question still in the syllabus, as I can't find any reference to it? "Explain why alkanes and their corresponding alkenes have similar physical properties, but very different chemical properties." 3 marks Thanks

Using a g-force scale is easier than an absolute force scale, as astronauts all experiences different forces during launch. Also because g-forces are just the multiples of a person's weight, so using it's useful for comparing different launches for people who would have different masses, etc.

Uhh, that looks hard. What topic is that in?

Ahh crap... Yes that's the correct formula above. Thanks for pointing that out.

Physics also overlaps a bit with Chem, especially for the Nuclear stuff.

F=ma T-mg=ma T=m(g+a) 5.50 x 10^1=m(9.8+(6.378 x 10^2)) m=(5.50 x 10^1)/(9.8+(6.378 x 10^2)), and use a calculator, should be correct unless I've made some stupid error. F=ma 0.34=0.85a a=0.34/0.85 S=ut+(at^2) 0.8=0+(0.34/0.85)t^2 <-- solve for positive value of t etc...

Hi, where did you get the 3 and 4's in the denominator from? Thanks

Hahahah!!! |NOVICE|

Hello, Could someone please do this for me? Thanks A solid has a square base of side 6m. Each section of the solid at a height hm above the base is a square whose side varies as (4-h). Find the volume of the solid. The answer is 48m3, and I don't know how to get to it. Could someone please...

jchoi, All I'm saying that these types of questions are quite uncommon and yet everyone is acting like I'm some sort of person trying to give misleading information. Note that I never said not to study it, I want people to draw their own conclusions to whether they will study it to great depths...

Why would you carry a knife? You're basically saying that if you were faced with such a situation and pulled out a knife, then you'd either have to stab, or be stabbed by your own knife. So I wouldn't carry a knife IMO.

If you were dealing with CHANGES in GPE, you would get the correct MAGNITUDE if you omitted the negative signs, but this is very inconvenient, as some questions ask to calculate the GPE of an object, given its GPE at its current position (value of GPE, which is negative), and if it moves up (or...

Depends on how far you are from centre of the Earth.