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Explain why the stability of a car can be improved by widening the wheel base and lowering the centre of gravity.

A car will topple over when it is tilted so far that the line of action from the centre of gravity falls outside of the wheel base, causing a resultant moment around the side being tilted. Extending the base...
TH
Answered by Tim H. • Physics tutor
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What is an antibody?

An antibody is a chemical released during an infection by lymphocytes that attach to specific antigens.
JC
Answered by Jonathon C. • Biology tutor
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How are animals adapted for effective gas exchange?

Many alveoli which provide a large surface area for rapid diffusion. The walls of the capillaries are only one cell thick which provides a short diffusion pathway, allowing rapid diffusion. Blood circulation...
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Answered by Rose V. • Biology tutor
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The Tour de France is 2162miles long. A cyclist knows his average speed his 12.37 miles/hour from his previous races. For the Tour de France the cyclist knows he will cycle for 10 hours a day. Estimate how many days it will take him to complete the race.

First you must figure out your estimates, in this case you can round 2162 down to 2000 and 12.37 to 10 to make your solutions easier. First you must calculate the total number of hours it is going to take hi...
Answered by • Maths tutor
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Discuss the ways in which Stevenson depicts male oppression in victorian society in Dr Jekyll and Mr Hyde

Stevenson challenges victorian beliefs through the use of the metaphor " So recently restrained down". This seeks to express how victorian men felt entrapped in their own state of mind, as they wer...
DL
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