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How does water travel up the stem of a plant from the roots to the leaves, wouldn't gravity prevent this?

Water molecules are polar. This means that one end of the molecule is slightly negatively charged (the oxygen atom) and one end of the molecule is slightly positively charges (the hydrogen atoms). The slight...
LR
Answered by Lauren R. • Biology tutor
57432 Views

What are the characteristics for perfect competition firms and when do they make profit?

The chracteristics of perfect competition are: many firms, freedom of entry and exit, all firms produce identical or homogenous products, all firms are price takers(have no influence over the price) and have...
DC
Answered by Diana C. • Economics tutor
5717 Views

What is de Moivre's theorem?

de Moivre worked out a brilliant and beautiful way to solve complex equations. If you for example have z 3 = 1 and you want to find all real and complex z that satisfy this equation. i is just a complex numb...
FD
2555 Views

How is the French subjunctive mood constructed?

The subjunctive mood is used in French to express several different things, such as uncertainty, hope or fear. Firstly we will look at how it is constructed: For regular verbs, we take the third person plura...
AJ
Answered by Alice J. • French tutor
2747 Views

solve for x: (x-2)(x+3)=2(2x+11)

expand the brackets to get x 2 -2x+3x-6=4x+22 bring all the terms to one side x 2 -2x+3x-6-4x-22=0 (remember:if you do something to one side, do the same thing to the other! e.g. -4x on both side) gather all...
JR
Answered by Jack R. • Maths tutor
5936 Views