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What is the chain rule?

A special rule, the chain rule, exists for differentiating a function of another function (finding dy/dx).

Consider the expression cos x2 . We call such an expression a ‘function of a fu...

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Answered by Diego M. Maths tutor
2877 Views

By discussing the structure and bonding properties of chlorine and sodium chloride, explain why chlorine is a gas at room temperature but sodium chloride is a solid.

Within the chlorine molecule, there are covalent bonds present between each atom of chlorine. This results in the formation of simple molecules, meaning there are no bonds between molecules of chlorine. A...

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Answered by Alex T. Chemistry tutor
16313 Views

Express √75 in the form of n√3 , where n is an integer. Using this information, solve the following equation: x√48 = √75 + 3√3 (4 marks)

√75 = 5√3, therefore 

x√48 = √75 + 3√3

x√48 = 5√3 + 3√3

x(√16 x √3) = 5√3 + 3√3

4x√3 = 5√3 + 3√3

4x√3 = (5 + 3)√3

4x√3 = 8√3

x√3 = 2√3

x = 2

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Answered by Alex T. Maths tutor
7653 Views

There is an increasing worry about the rise of antibiotic-resistant bacteria, such as MRSA. How can doctors ensure that this threat is minimised? (2 marks)

Doctors can ensure that there is a reduced number of antiobiotics prescribed for patients. They can also make sure that patients are fully evaluated so as to stop the prescription of antibiotics for viral...

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Answered by Alex T. Biology tutor
2084 Views

What is the refractory period of a nerve action potential?

The refractory period is composed of two parts. The first part is the absolute refractory period in which another action potential cannot be stimulated in the nerve. In the relative refractory period that...

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Answered by Karthik K. Biology tutor
10348 Views

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