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Outline the main differences between an artery and a vein? (6 marks)

An artery carries blood away from the heart. The blood is oxygenated with the exception of the pulmonary and umbilical artery. The vessel must cope with high pressure demands and therefore has thick, elas...

KB
Answered by Katy B. Biology tutor
2990 Views

Given the parametric equations x = lnt+t and y = sint calculate d^2y/dx^2

First we can write d2y/dx2 as (d/dx)(dy/dx). Now we need to find dy/dx. This can be further written as (dy/dt)(dt/dx). These derivatives can be obtained from the given parametric equ...

AR
Answered by Agnieszka R. Maths tutor
4166 Views

Outline two limitations of Zimbardo's study into conformity to social roles. [4 marks]

  1. This study suffers from a lack of ethical consideration - Zimbardo's participants failed to leave the study in the same way they entered. Furthermore, they were exposed to intense mental harm, s...

EK
Answered by Emile K. Psychology tutor
13622 Views

‘The rebellion of 1173-4 was caused by the Henry II’s treatment of his sons.’ Assess the validity of this view.

Between 1173 and 1174, a series of revolts commonly referred to as the Great Rebellion occurred across Henry II’s ‘empire’: Muhlberger illustrates that he faced “nearly simultaneous invasions in Northumbr...

KR
Answered by Kate R. History tutor
16911 Views

How do you split a fraction into partial fractions?

In the exam you will be given a fraction with polynomial numerator and denominator, the denominator will either be factored or factorable. Firstly, you need to factorize the denominator. Then to write as ...

CW
Answered by Cameron W. Maths tutor
11173 Views

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