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Find an expression for the escape velocity of a test object.

Escape velocity is the velocity required to just escape the gravitational pull of a body. The gravitational force of a body is given by Newtons Law: F = GMm / r 2 (where G is the gravitational constant, M is...
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Answered by Ciara N. • Physics tutor
2746 Views

Name and explain briefly the main stages of mass spectroscopy.

Mass spectroscopy is a highly sensitive method of analysing samples of elements and determining the isotopes present and their relative amounts. We can break down the method into four major steps: (in order)...
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Answered by Esther W. • Chemistry tutor
3075 Views

Explain how red blood cells are adapted to carry out their function?

Red blood cells transport oxygen from the lungs to all the cells in the body. To do so effectively, they have lots of adaptations: Red blood cells contain haemoglobin , which is a molecule that r eversibly b...
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Answered by Francesca G. • Science tutor
91849 Views

How do I get balance in my essay while still having a definitive conclusion?

Having a definitive, consistently-argued view is one of the most important features of a good history essay. However, a good essay will also consider other perspectives. Rather than viewing the task of balan...
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Answered by Saskia W. • History tutor
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Give 2 adaptions of the alveoli that maximise gas exchange

Curved surfaces, providing a large surface areaThin, providing a short diffusion distance
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Answered by Michael H. • Biology tutor
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