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Which is heavier, a ton of feathers or a ton of lead?

They're both the same. The feathers would take up a lot more space though! Feathers have a lower density than lead (i.e. for the same volume, feathers are less heavy). In practice, if you drop a tonne of fea...
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Answered by Francis N. • Physics tutor
20086 Views

Given that z = 6 is a root of the cubic equation z^3 − 10z^2 + 37z + p = 0, find the value of p and the other roots.

Okay, first, we will tackle this by using the information given to us (z=6) to solve for p. By substituting 6 wherever there is a z, we will end up with 216 - 360 + 222 + p = 0.Solving this through rearrange...
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Answered by Andrew W. • Physics tutor
3920 Views

Joe buy a pack of 7 chocolate bars. The pack costs £5.97, Joe sells all 7 chocolate bars for 87p each. Work out Joes percentage profit to 2 decimal places.

7 x £0.87 = £6.09(6.09/5.97) x 100 = 102.01%so percentage profit is 2.01% to 2 d.p.
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Answered by Joel L. • Maths tutor
3081 Views

What is the best way to revise for English literature?

Different revision techniques work for different people, but I find that employing a variety of different methods is often the best way to ensure that the most information information is retained. When study...
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Answered by Abbie R. • English tutor
2065 Views

How should I approach primary sources in my A-level exam?

The basic expectation of any examiner when marking a source-based question is whether you have identified the value of the source to an historian with reference to the relevant historical context. This does ...
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Answered by Alexander G. • History tutor
2538 Views