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Explain the four processes of erosion in rivers.

Hydraulic action: This process involves air particles finding their way into the cracks of rocks. This then causes air particles to compress which adds pressure, causing rocks to break away and erode. Abrasi...
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Answered by Katie J. • Geography tutor
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What is mitosis?

Mitosis , or cell division, is a process where a single cell divides into two identical daughter cells . When answering this question it is important to be clear about what is being replicated. Simply saying...
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Answered by Claire H. • Biology tutor
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How do you work out the old price of an item having been given the new price after a specified percentage change?

These problems can be worked out using the equation: new = old x multiplier Where: new : is the new price of an item old : is the old price of an item (before it was changed) multiplier : is the percentage o...
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Answered by Rachael T. • Maths tutor
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How do you go about rearranging equations where the required subject appears on both sides? Such as making x the subject of 7x + a = 3x + b.

To rearrange any equation, you must always do the same to both sides. If you take a number from one side, you must also take it from the other. If you divide a side by one number you must divide the other by...
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Answered by Rachael T. • Maths tutor
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Describe how plants react to the environmental factor of Light

One environmental factor which has an effect on a plant is light. The stems of a plant grow towards the light, and roots grow away from the light. We call this phototropism (Photo = Light and Tropism = movem...
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Answered by Ellie A. • Biology tutor
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