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Prove that matrix multiplication is not commutative.

At GCSE level, proof questions are relatively rare and largely will all require a similar sort of approach. The difference with A Level is that the syllabus contains more than one method of proof. You will b...
SF
23768 Views

A satellite is in a stationary orbit above a planet of mass 8.9 x 10^25 kg and period of rotation 1.2 x 10^5 s. Calculate the radius of the satellite's orbit from the centre of the planet.

A body in a stationary orbit will always remain above the same point on the planet as it orbits. For a body to be in such an orbit, it must rotate around the planet in the same direction as the spin of the p...
DA
Answered by Dorian A. • Physics tutor
4820 Views

How do you use Pythagoras' Theorem?

Pythagoras' Theorem states that h 2 = a 2 + b 2 . This is where you have a right angled triangle, with sides a, b and h where h is the hypotenuse. For example, if we had a triangle with sides of length 3 and...
RB
Answered by Ryan B. • Maths tutor
5582 Views

How do I do a close reading of a poem?

In order to close read a poem, I would recommend reading the poem over a few times, and to start with highlighting anything that stands out to you. This could include alliteration, capitalisation of words, u...
MT
6771 Views

How do you find the minimum of the equation sin^2(x) + 4sin(x)?

The first step to solving this problem is to treat it as a normal quadratic equation; if you are struggling with comparing our equation to a normal quadratic, try substituting sin(x) = y into the equation as...
KS
Answered by Kirsten S. • Maths tutor
5756 Views