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PQRS is a parallelogram with P->Q=a and P->S=b. Find S->Q in terms of a and b. N is a point between S and Q, where SN:NQ is 3:2, find N->R

Vectors are special in that they have a direction as well as magnitude (size). To get from S->Q you can go from S->P = -b and then P->Q = a so S->Q = - b + a = a - b (remember underlining) To fin...
KB
Answered by Kristian B. • Maths tutor
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What are the main differences between mitosis and meiosis?

Mitosis Human cells have 23 pairs of chromosomes (diploid - 2 copies of each chromosomes). This is a form of cell devision which makes an exact replica of the cell that is dividing. The cell grows and the DN...
JY
Answered by Jun Yu C. • Biology tutor
5151 Views

Use your knowledge of natural selection to suggest how the peacock's tail has evolved.

Mutation Competition Females are attracted to the tail Reproduce with males with an extravagant tail Offspring pass on the characteristic of an extravagant tail Offspring inherit the gene for producing an ex...
NF
Answered by Nathan F. • Biology tutor
8129 Views

How should I tackle an unseen poem during the exam?

First, it is always a good idea to read through the poem twice so you have an idea of what the poem is about. Once you've completed this, pick out at least one theme you think runs really strongly throughout...
MK
4570 Views

How can I draw a 30 degree angle without a protractor?

In the exam you will have a ruler and a pair of compasses, which you can use to construct a 60 degree angle by drawing two arcs. You can then draw two more arcs to bisect that 60 degree angle and make a 30 d...
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Answered by Zoe C. • Maths tutor
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