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A spherical object of mass 150kg is orbiting the Earth. The distance between the centre of the object and the centre of the Earth is 25,000m. What is the kinetic energy of the object?

This is an example of circular motion caused by a centripetal force. In this case, the centripetal force is the gravitational force between the Earth and the object. Linking the equations for circular motion...
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Answered by Ryan L. • Physics tutor
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What are the four levels of protein structure?

Primary - The sequence of amino acids in the Protein, defined by the DNA sequence coding for the protein. Secondary - Any folding or coiling within the protein which are stabilised by hydrogen bonds. The two...
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Answered by Theo N. • Biology tutor
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Solve X^2 +13X+48=12

It is first important to get the equation to equal 0, so to do this you minus 12 from each side of the equals symbol, giving youX^2 +13X+36=0Now it is time to think about factorising!The best trick for this ...
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Answered by Kemba M. • Maths tutor
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Help, I have designers block!

We all get to the point where we have been drawing or working on a project for so long that we feel completely uninspired.Its often a good idea to take a break at this point, if you're really stressed and wo...
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2087 Views

How should I approach my GCSE maths paper?

The way that papers are set is that you usually can allow just over a minute for each mark. This means if a question is 6 marks, it should take about 6 minutes to answer. It is generally a good idea to be qu...
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Answered by Kemba M. • Maths tutor
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