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To what extent do you agree that the car ‘changed the face of America’? (20 marks)

The invention and proliferation of the automobile definitely changed the face of America to a very large extent. This can be seen through the effects the car had on American culture, business, and the lifest...
TD
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Discuss the Authoritarian Personality as an explanation for obedience (16 marks)

The authoritarian personality refers to a specific personality held by people which makes them more prone to obedience. It can be measured through a system, devised by Adorno et al (1950), called the Califor...
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Why do cells have receptors that allow viruses to invade?

Rather than cells having receptors specific to viruses, cells have receptors specific to molecules it needs to acquire from outside the cell, such as glucose (needed for respiration). It is the viruses who a...
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Answered by Emily R. • Biology tutor
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differentiate the following to find the equation for the gradient of the curve in terms of x and y: 3x^3 + 4x^2 + 5xy + 7y = 0

9x^2 + 8x + 5y +5xdy/dx + 7dy/dx = 0 9x^2 + 8x + 5y = dy/dx(-5x - 7) dy/dx = - (9x^2 + 8x +5y)/(5x + 7)
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Answered by Hew P. • Maths tutor
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Differentiate 8x^4 + 2x^2 + 10

Differentiating is a process to turn one expression into another, which has many uses in maths. Our expression is made up of three parts: 8x 4 , 2x 2 and 10. We differentiate each part seperately. The proces...
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Answered by Jamie C. • Maths tutor
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