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Explain Cohesion-Tension Theory

Transpiration of water through stomata creates low potential at the top of the xylem. Water molecules stick together via hydrogen bonds in a process known as COHESION. This occurs because...

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Answered by Joanne M. Biology tutor
11360 Views

Describe and explain the photoelectric effect.

Consider a single photon (a particle of light) of a particular energy striking the surface of a metal. If the energy of this photon exceeds the work function of the metal, it will remove a single electron...

AR
Answered by Abbie R. Physics tutor
1919 Views

In the topic of transition metals, what are the different types of ligands and what in itself, is a ligand?

Firstly, ligands are an atom, molecule or ion which can donate a electron pair (lone electron pair). In a diagram, we would show this donation of a lone electron pair to a central metal ion by using a arr...

Answered by Chemistry tutor
2483 Views

Integrate (x+2)/((x+5)(x-7)) using partial fractions between the limits 5 and -2, giving your answer to 3sf

First, we're going to split this 1 fraction into 2 fractions. Let (x+2)/((x+5)(x-7)) = A/(x+5) + B/(x-7) then multiplying by (x+5)(x-7) gives A(x - 7) + B(x + 5) = x + 2 multiplying this out we achieve Ax...

Answered by Maths tutor
3205 Views

When should you use ‘Imperfetto’ tense and when ‘Passato Prossimo’ one?

‘Imperfetto’ is used to describe actions and situations in the past, to describe something you used to do in the past and for simultaneous actions in the past. On the other hand, ‘Passato Prossimo’ is use...

Answered by Italian tutor
1862 Views

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