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A ball is thrown in the air. The height of the ball at time t is given by: h=5+4t-2t^2. What is its maximum height? At what time does the ball reach this height?

First, we find the derivative of h: dh/dt= 4-4t. To find the point(s) of interest, we solve dh/dt=0. This gives the answer t=1. In order to determine whether t=1 is a minimum point or maximum point we find t...
DS
Answered by Debbie S. • Maths tutor
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Explain how oxygen and carbon dioxide are transported within the blood?

Oxygen diffuses through the alveolar wall into the capillary beds surrounding the lungs, and here it enters the red blood cells (erythrocytes). It binds to protein contained within the red blood cell called ...
DT
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Explore how Shakespeare presents the theme of knowledge and/ or knowing in Hamlet. You must relate your discussion to relevant contextual factors and ideas from your critical reading.

Shakespeare treats knowledge as a superficial and frail concept that, despite humanity’s innate desire to acquire it, is the cause of self-damnation and destruction. This can be seen in Shakespeare’s present...
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Answered by Meg R. • English tutor
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Explore the significance of character's attitudes towards humanity in Frankenstein.

In the extract, the Creature contemplates on the DeLacey family and reveals much about his attitudes towards humanity. Shelley writes that the Creature “saw no reason for their unhappiness” but that he “was ...
KN
Answered by Katherine N. • English tutor
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The work of American writers Ralph Ellison, Sylvia Plath, and Anne Sexton is often described as 'confessional' writing. How do these texts complicate the idea of confession?

In his essay ‘The World and the Jug’, Ralph Ellison asserts, ‘being a Negro American involves a willed (who wills to be a Negro? I do!) affirmation of self against all outside pressure.’ This resistance summ...
EM
Answered by Ellie M. • English tutor
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