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What is the most efficient way of structuring a history GSCE or an A-level essay question?

The most common question asked by all History students are to do with the way in which they are expected to structure an essay and how to stick to the question asked. It is so easy to lose out on marks...

Answered by Aldona G. • History tutor

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How can I find out the Young's modulus of a material?

Right, so the Young's modulus of a material is a measure of it's rigidity. The higher the value of the Young's modulus, the more rigid the material is.Ok, so the Young's modulus, E, is eq...

Answered by William S. • Physics tutor

6373 Views

Two identical uniform spheres each of radius R are placed in contact. The gravitational force between them is F. They are then separated until the force between them is one ninth of the magnitude. What is the distance between the surfaces of the spheres?

With electostatics, it is important to remember that inthe equation giving the force between two point charges, the force is inversely proportional to the square of the distance of the charges.

Answered by Mrinank S. • Physics tutor

22400 Views