Top answers

What does dy/dx represent?

dy/dx represents the gradient of a curve. The d represents an infinitesimally small range so it is essentially as though you are doing change in y over change in x like you would for a y = mx +c graph but ov...
MD
Answered by Madeleine D. • Maths tutor
42683 Views

Is there a way to find out a nouns gender?

Although it may seem that the gender of French nouns is random and you have to memorise each, there is a simple way of using the word's ending to gauge it's gender. Masculine Endings: -age -ment -il , -ail ,...
CB
Answered by Caitlin B. • Economics tutor
3565 Views

How do I do integration by parts?

Say we have an equation with the product of two subjects in the form f(x) = u(x)v(x). Differentiating is simple, we would just multiply the differential * of u(x) by v(x) and add the differential of v(x) tim...
DA
Answered by Doug A. • Maths tutor
5195 Views

How does MRI work?

MRI stands for magnetic resonance imaging and uses the application of a magnetic field and radio frequency photons to manipulate the spin state of protons (hydrogen nuclei). Hydrogen is one of the most abund...
SV
Answered by Sebastian V. • Biology tutor
10252 Views

How do I calculate the percentage by mass of a metal within an impure substance?

For this question we will look at Sodium Sulphite (Na 2 SO 3 ) and its titration against Potassium Permanganate (KMnO 4 ). This requires acidic conditions. In this example we need to know several things: Tha...
SV
14743 Views