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How do I show two vectors are perpendicular?

Vectors can describe a line of particular length ("magnitude") and direction. The angle x between two vectors a and b can be found using the formula a.b = | a | | b | cosx. For the vectors to be pe...
SA
Answered by Sarah A. • Maths tutor
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What college should I choose to apply to?

What college you attend at Oxford or Cambridge isn't that important - whichever college, you are sure to make friends, have a good time and receive quality teaching. If you apply to Oxford you will usually b...
SA
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The pancreas is an endocrine and an exocrine gland, indicate both of these functions.

Pancreas' exocrine function is mainly aimed at digesting food. It secrets pancreatic digestive enzymes which travel into the pancreatic duct and are released into the duodenum. Pancreas' endocrine function i...
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Answered by Fady K. • Biology tutor
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Differentiate 2x^3 - xy^2 - 4

Differentiate the first term 2x3 as normal by multiplying the coefficient of x by the power and subtracting the power by 1 to get 6x 2 . For the next term you have to use the product rule as you have two var...
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Answered by Elena V. • Maths tutor
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Explain Aquinas’ Natural Law Theory

Natural Law is a deontological and absolutist theory created by Thomas Aquinas: a Catholic monk, and one of the founders of the Catholic church. It’s based on Aristotle’s agent centred idea that all human be...
MD
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