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How can I recognise the subjunctive?

It can be tricky to know how to recognise the subjunctive tense, particularly since it is rarely used in English! Rather than referring to the subjunctive as a "tense" it is better to understand it...
BH
Answered by Beatrice H. • Spanish tutor
2875 Views

How many joules of heat energy are required to raise the temperature of 10kg of water from 22⁰C to 27⁰C? (The Specific Heat Capacity of water is 4200 Jkg^-1⁰C^-1)

Heat energy Q = mass of substance m X SHC of substance C X change in temperature ΔT Q = 10kg X 4200Jkg^-1⁰C^-1 X (27-22)⁰C Q = 10kg X 4200Jkg^-1⁰C^-1 X 5⁰C Q=210,000J = 210kJ 210 kilojoules of energy is requ...
JS
Answered by Jordan S. • Physics tutor
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Solve 6x^2-13x=5

To be able to solve a quadratic, you must make it equal to zero. So the first thing you have to do is take away 5 from both sides. You could take away 6x^2-13x from each side, but it is much easier to keep y...
EC
Answered by Eleanor C. • Maths tutor
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How do I find the equation of the tangent of a curve at a specific point.

The gradient is the rate of change at a specific point on the curve. Since the tangent is a straight line that touches the curve only once at a specific point, the gradient of the curve and the tangent will ...
AS
Answered by Aref S. • Maths tutor
4473 Views

Use the substitution u = 6 - x^2 to find the value of the integral of (x^3)/(sqrt(6-x^2)) between the limits of x = 1 and x = 2 (AQA core 3 maths

When integrating by substitution the first thing to do is change the limits of the integral by subbing them into the equation for u. This gives u = 5 as the lower limit and u = 2 for the upper limit. The nex...
CC
Answered by Christopher C. • Maths tutor
8500 Views