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What is the point of differentiation?

Differentiation is a very useful concept; informally it tells us how 'fast' something is changing. A real-life example is given by the first and second derivatives of distance with respect to time: the fi...

Answered by Jake H. • Maths tutor

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State three differences between the structure of DNA and the structure of RNA

When comparing the structure of DNA and RNA (draw structure), DNA is double stranded whilst RNA is single stranded. Lets now discuss the molecular structure of DNA and RNA. DNA consists of nitrogen bases ...

Answered by Sarina R. • Human Biology tutor

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A crane is attached to one end of a steel girder, and lifts that end into the air. When the cable attached to the end of the girder is at 20 degrees to the vertical, the tension is 6.5kN. Calculate the horizontal and vertical components of this force.

6.1kN vertically up

2.2kN horizontally to the right

Answered by Alex R. • Physics tutor

2964 Views

What is the difference between a Scalar and a Vector?

A vector is any physical quantity which has a direction and a magnitude, whereas a scalar is a physical quantity that is not directional (magnitude only).

Answered by Alex R. • Physics tutor

1703 Views

Why should we not overprescribe and overuse antibiotics?

Antibiotics are used for killing bacteria and therefore, it can act as a selection pressure. This means that the bacteria can mutate, in order to avoid being killed and this would be a favourable mutation...

Answered by Niva R. • Biology tutor

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