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Why does the first ionisation energy of atoms generally increase across a period?

The first ionisation energy is defined as the energy required to remove one mole of electrons from each atom of a mole of gaseous atoms. As we go along a period in the periodic table, the atomic number in...

Answered by • Chemistry tutor

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How does DNA replication work?

DNA replication is called semi-conservative, because each original strand is used to create a new strand. In order to do this, first we need to separate the two strands: they are unwound and unzipped by t...

Answered by Ellie T. • Biology tutor

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Express as a single logarithm 2 loga 6 loga 3 [2 marks]

loga12
explantion:from simples rules of logs

Answered by • Maths tutor

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the moon takes 27.3 days (2.36x10^6s) to orbit the earth . Calculate its distance from the earth . Take the mass of the earth to be 5.975x10^24kg.

Use the set formula T²=(4Pi^2/GM)R^3 and rearrange for r^3 to give
r³= T²GM/ 4Pi²
then insert values : r³ = (2.36x10⁶)²

Answered by • Physics tutor

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How does Shakespeare use setting in the play Hamlet?

To answer an essay question such as this you would need to come up with around 3 or 4 separate examples. You may want to start with the opening scene - the castle cloaked in the darkness of midnight which...

Answered by • English tutor

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