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How might you use sound waves to smash a glass? What are other examples of resonance in everyday life?

The natural frequency of a glass can be found by tapping it or making it 'sing' (running a wet finger around the top of the glass till it sings a note. If you emit sound waves at this frequency in the direct...
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Answered by Josie R. • Physics tutor
2894 Views

How do you conjugate the present subjunctive mode?

For regular verbs, these conjugations are relatively easy - the way I remember it is that you switch the endings of AR verbs with those of ER/IR verbs in the indicative. e.g. present indicative com er : yo c...
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Answered by Ashley M. • Spanish tutor
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What is the definition of structural isomerism and what are the different types?

Structural Isomerism: Molecules with same molecular formula and different structural formula. Different types: Positional, chain, functional group
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Answered by Ellie A. • Chemistry tutor
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How are the dead presented in this anthology? Refer to two or three texts in your answer. (World War One Literature)

The dead are a central focus for war poetry and the notion of death is trivialised throughout the poems in this anthology. Poems such as 'The Soldier' by Rupert Brooke glorify the dead and display the afterl...
RD
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Vaccines have become an effective way to prevent certain diseases, however for some viruses it is difficult to develop a vaccine. Describe possible difficulties of developing a permanent vaccine for the influenza virus.

The influenza virus has a very high mutation rate. This means that its surface proteins (antigens) will change. Since a vaccine contains a specific antigen, if the virus switches to a different antigen, then...
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Answered by Nancy L. • Biology tutor
2970 Views