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A metal Sphere of radius Ym is melted down and remade into a cylinder of the same volume with height Ym with circular ends of radius 3m, find Y

The sphere has radius Y, so the volume of the sphere is 4/3 (pi) Y 3 , The volume is the same for the cyclinder so we know the volume of the cylinder in terms of Y. Cyclinder volume = area of circle face x h...
JC
Answered by James C. • Maths tutor
3636 Views

What is Pythagoras's theorem?

Pythagoras's theorem is used to calculate the lengths of the sides of right-angled triangles. The theorem can be used to find the length of the third side of a right-angled triangle, as long as the lengths o...
SJ
Answered by Samuel J. • Maths tutor
4546 Views

How do you find the maximum and minimum value of a quadratic function with no use of calculus?

By completing the square, since this makes you see that the square will always be >= 0 and the other part allows you to calculate the minima or maxima depending on the sign in front of x 2 . E.g. x 2 +4x=...
AO
Answered by Alexander O. • Maths tutor
10770 Views

How did Hitler change the Nazi party between 1924-1929? (8 marks)

This is a change/development question, and because it is 8 marks you should spend 12 minutes on it. Aim for 3 distinct points in 3 separate paragraphs. In order to get the full 8 marks, you must link each pa...
EG
Answered by Elly G. • History tutor
9278 Views

Describe the formation of a waterfall?

Waterfalls form where there is a layer of hard rock on top of a layer of soft rock. The soft rock is eroded more quickly and undercuts the hard rock creating a ledge. The overhanging ledge is unsupported and...
EB
Answered by Emily B. • Geography tutor
4206 Views