Top answers

What is a catalyst, and how does it affect the rate of reaction?

A catalyst is a substance which provides an alternative pathway requiring a lower activation energy for the chemicals to react, and speeds up the rate of reaction. A catalyst also remains chemically unchange...
JE
Answered by Julia E. • Chemistry tutor
2992 Views

Integrate xsin2x

Integrate by parts: integral = [uv] - ∫u'v dx (u'= derivative of u, v'= derivative of v) u= x u'= 1 v' = sin2x v= -0.5cos2x = -0.5xcosx - ∫-0.5cos2x dx = -0.5xcosx + 0.25sin2x + c
JE
Answered by Julia E. • Maths tutor
21791 Views

What is the best way to show that I have knowledge?

With regards to the Oxford interview, the tutors want to see your knowledge, of course. More important, however, is your attitude and your ability to think on the spot. They want to accept students who are i...
AW
2047 Views

What is the area bound by the x-axis, the lines x=1 and x=3 and the curve y=3x^(2)-1/x ? Answer in exact form.

Integrate, y= 3x 2 -1/x 1{ 3 3x 2 - 1/x dx = [x-lnx] 3 1 = (3-ln3)-(1-ln1) = 3-ln3-1+0= 2-ln3
EL
Answered by Escher L. • Maths tutor
4547 Views

Please explain the difference between compound and simple interest

First of all, let's start by defining the word 'interest'. Interest in mathematical terms generally means an amount of money that is accumulated over a period of time after an amount of money is invested or ...
HM
Answered by Henry M. • Maths tutor
4978 Views