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What is entropy?

Entropy is the level of disorder in the universe. The more disordered something is, the higher its entropy. Molecules in solids ae specifically arranged and vibrating, hence the level of disorder is low, mea...
RB
Answered by Rajas B. Chemistry tutor
2570 Views

Factorise 6x^2 + 7x + 2

6x^2 + 7x + 2 can be written in the form ax^2 + bx + c. In order to factorise this I use the following method which can be used to factorise similar equations. Multiply 'a' and 'c' to get ac (here this is 6 ...
HP
14432 Views

Prove the trigonometric identity tan^2(x)+1=sec^2(x)

We can start with the identity sin 2 (x)+cos 2 (x)=1 If we divide through the equation by cos 2 (x), we get: sin 2 (x)/cos 2 (x) + cos 2 (x)/cos 2 (x) = 1/cos 2 (x) If we look at the left hand side of the eq...
CW
Answered by Charlotte W. Maths tutor
25090 Views

Find the equation of the tangent to the curve y = 2x^2 + x - 1 at the point where x = 1.

To get the required tangent equation we need its gradient and the coordinates of a point it passes through. We can then substitute it into the formula y - y 1 = m(x - x 1 ). 1. Finding the gradient: To find ...
BT
Answered by Beth T. Maths tutor
12319 Views

What is the difference between a direct and an indirect object pronoun?

A direct object pronoun means the object (the person or thing that the verb is happening to) receives the action of a verb directly WITH NO PREPOSITION between the verb and the pronoun- in other words, the p...
LM
Answered by Lauren M. French tutor
3951 Views