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What is the life cycle of a star?

Star formation begins when dust and gas starts to gather to form a cloud called nebula . Gravity causes the cloud to spiral and form a Protostar , where gravity accelerates the gas particles, resulting in he...
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Answered by Barbara P. • Physics tutor
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How do I answer the 6 mark question: Explain why malnutrition is widespread in certain parts of the world?

6 mark questions such as this require clear definition alongside a clear explanation backed up with some supporting evidence. You can see this is the case because the question begins with the command words '...
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Answered by Anna H. • Geography tutor
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Find the first 3 terms and the sum to infinity of a geometric series with first term, 10 and common ratio 0.2

General form of a Geometric series: a + ar + ar^2 + ar^3 + ar^4 + … First three terms: 10 + 10 0.2 + 10 0.2^2 = 10 + 0.2 + 0.04Nth Term of a Geometric Series: ar^n-1 where there are n terms Proof of sum of t...
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Answered by Daniel W. • Maths tutor
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What is political apathy?

Political apathy is generated through feelings of disinterest or indifference towards politics and political activities. This includes civic responsibility, civic engagement, and participation in electoral p...
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Answered by Lucien B. • Politics tutor
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How does a vaccine lead to the production of antibodies and why does this provide immunity?

Vaccines are designed so that they contain antigens - for example viral antigens from the virus we wish to protect against. When these are injected they are recognised as foreign by white blood cells called ...
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Answered by Emily J. • Biology tutor
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