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A Level

Is the current American president imperial?

Conclusion: The current American President shows signs of both being imperial and imperilled. Different elements of his incumbency indicate his weak nature; the constraints from Congress and from the cour...

TN
Answered by Thomas N. Politics tutor
6011 Views

What is the difference between direct and indirect democracy?

Firstly, you need to consider what democracy means. The most simplistic way of defining democracy is as a system whereby power is 'for the people and by the people'. This means people are able to particip...

AS
43625 Views

How do you prove two straight lines intersect?

There are two ways to prove they intercept (you can choose whichever one you prefer). Say we have two straight lines, for example: r1 = 3i + 4...

NM
Answered by Nicholas M. Maths tutor
11308 Views

A golf ball is hit at angle θ to the horizontal, with initial velocity u. Stating an assumption, show that the horizontal distance travelled by the ball is directly proportional to u^2.

If we assume there is no air resistance, this means that the horizontal component of the ball's velocity won't change. Resolving horizontally we can see that the horizontal velocity = ucos(θ). We can ...

DB
Answered by Douglas B. Physics tutor
10997 Views

Given that y = x^4 tan(2x), find dy/dx

Here we have a product of two functions - they are being multiplied together - so we need to use the product rule. The product rule is: if y = u·v, dy/dx = v·u' + u·v' (where f' stands for df/dx). u = x^4...

DB
Answered by Douglas B. Maths tutor
10477 Views

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