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Based on Newton's 3 laws of motion why is linear momentum always conserved?

This is a common IB question- fairly tricky the first time you com across it!
ST
Answered by Simon T. • Physics tutor
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What is meant by Parsons 'instrumental' and 'expressive' roles?

This is an important theory when looking at the domestic division of labour from a functionalist perspective. Parsons (1955) argues that in the nuclear family the husband and wife have different separate rol...
FH
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Explain the trend in Ionisation energy when moving across a period and down a group

Key definitions/explanation of terms Ionisation energy is the energy required to r emove one mole of electrons from one mole of gaseous atoms to produce one mole of gaseous ions with a 1+ charge. Electron sh...
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Answered by Olivia F. • Chemistry tutor
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Explain which species is oxidised in this reaction: Br2 +2I– = 2Br– +I2

A useful way to answer oxidation/reduction questions is to remeber the acronym OIL RIG: O xidation I s L oss (of electrons) R eduction I s G ain (of electrons) In this example Iodine is going from 2I- to I2 ...
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Answered by Rory B. • Chemistry tutor
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Explain which species is oxidised in this reaction: Br2 +2I– 2Br– +I2.

A useful way to answer oxidation/reduction questions is to remeber the acronym OIL RIG: O xidation I s L oss (of electrons) R eduction I s G ain (of electrons) In this example Iodine is going from 2I- to I2 ...
RB
Answered by Rory B. • Chemistry tutor
10495 Views