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What is the meaning of vector cross product?

A binary operation between two vectors it results in another vector perpendicular to the two input ones meaning it is the normal of the plane containing the two vectors involved in the operation. An advanced...
AM
Answered by A M S. • Maths tutor
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What are the products of the hydrolysis of phenacetin by a base? Phenacetin was once used in analgesic tablets, but it is no longer used because it has severe side effects.

The functional group on the right side of the benzene ring is an ether , which does not react with base. The functional group on the left is an amide. Hydrolysis of an amide breaks the bond between the nitro...
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Answered by Mona E. • Chemistry tutor
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How would the examiner mark my exam? Do i have to write everything about murder to get full marks?

It depends on if it is a scenario question or an essay question. With scenario questions you mainly have to apply areas of murder that have relevance to the scenario question. For example if there is nothing...
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Answered by Tishalina R. • Law tutor
2264 Views

P has coordinates (3,4), Q has coordinate (a,b), a line perpendicular to PQ has equation 3x+2y=7. Find an expression for b in terms of a

Rearrange the equation of the line perpendicular to PQ to give y = -(3/2)x + 7/2. Gradient of this line = -3/2Using the knowledge that the gradients of a line perpendicular to another line is related by a fa...
JL
Answered by Jack L. • Maths tutor
4981 Views

When a vaccine is given to a person, it leads to the production of antibodies against a disease-causing organism. Describe how. (5 marks)

With these 5 and 6 mark questions, one of the main skills required is being able to describe the process in sufficient detail, without wasting time with unnecessary information. For example in this question,...
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Answered by Thomas R. • Biology tutor
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