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Describe the process of a capacitor charging.

At first, there is a potential difference between the two plates of the capacitor equal to the potential difference between the two battery terminals. This causes electrons to build up on one of the plates m...
Answered by • Physics tutor
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How are stem cells used in Stargardt's disease?

Stem cells are undifferentiated cells that can give rise to different types of cells in the body from brain to muscle cells. Stem cells can be used to replace damaged or diseased cells with healthy ones. Ste...
Answered by • Biology tutor
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Do the benefits of protectionist trade policies outweigh the costs?

'Protectionism' is the policy of restricting trade between states through methods such as tariffs and quotas. Tariffs are often used to protect domestic consumers. The diagram linked here shows that a triff ...
EC
Answered by Emilia C. • Economics tutor
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To what degree is the power of the US president limited to 'the power to persuade'?

Richard Neustadt claimed that "presidential power is the power to persuade"; that is, given the limitated constitutional powers the president enjoys, the only way for them to fulfil their aims is t...
EC
Answered by Emilia C. • Politics tutor
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Please solve the following simultaneous equations 4x + 7y = 336 y = 6x + 2

Step 1 - through previous experience realise this equation can be solved by the substitution methodStep 2 - rearrange for the part you want to sub in, in this case it is done for us as Y is the variable we w...
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Answered by Eleanor S. • Maths tutor
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