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What is a vector?

A quantity may be a scalar (just a magnitude, just a number) or a vector, with magnitude and direction. For example, speed is a measure of how fast something is going, but velocity is a measure of how fas...

PC
Answered by Patrick C. Physics tutor
3237 Views

How do I differentiate an algebraic expression? (e.g. y=3x^4 - 8x^3 - 3) [the ^ represents x being raised to a power]

y=3x4-8x3-3
Let's say we want to calculate dy/dx. For a term Axn, the differential with respect to x is Anxn-1. For a constant value, we can say t...

PC
Answered by Patrick C. Maths tutor
3690 Views

Elemental analysis of a carbohydrate X showed the sample contained 48.7 % carbon and 8.1 % hydrogen by mass. Find the empirical formula of X.

These sorts of questions can look difficult, but if you learn the steps needed to solve them then they are all very similar.Step 1: Since we are told that X is a carbohydrate, we know tha...

JB
Answered by Jack B. Chemistry tutor
1923 Views

Find the coordinates of the stationary points of the curve 3x=y+6x+3

First, straight away from reading the question you know this question will involve differentiating the function with respect to x so immediately you want to re-write the equation in terms of y which in th...

JS
Answered by James S. Maths tutor
4199 Views

What is the difference between direct and representative democracy

Definitions: short, sharp key works to gain the marks- especially for the 5 mark definition questions in GPO1/GPO2
Direct Democracy:In a direct democracy people vote...

PS
111379 Views

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