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How does water move from the soil into plant roots?

The water moves into root hair cells by osmosis, as there is a high concentration of minerals/sugars in the cells, and little water. This decreases the water potential inside the cell, so water molecules mov...
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Answered by Timothy C. • Biology tutor
39807 Views

What advice do you have for preparing for a Spanish speaking assessment?

My biggest piece of advice would be to practice speaking your presentation with your written script in front of you at first. This way, you can focus on pronunciation, intonation, and where to pause for brea...
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Answered by Sophie K. • Spanish tutor
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How do I factorise difficult quadratic equations?

A quadratic equation such as 6x 2 + x - 35 = 0 may appear much harder to solve than a simpler equation which students might be more used to, such as x 2 + 5x + 6 = 0. In reality, there are a couple of method...
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Answered by Freddie G. • Maths tutor
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A stone is thrown upwards with a speed of v metres per second. The stone reaches a maximum height of h metres. h is directly proportional to v^2. When the stone is thrown at 10m/s, max height is 5m. Work out the maximum height reached when v = 24.

(Question 20 in AQA calculator paper from November 2017)This question is really wordy, so the first thing we want to do is condense all the information we are given into more manageable equations! The first ...
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Answered by Olivia H. • Maths tutor
9800 Views

Write x^2+6x-7 in the form (x+a)^2+b where a and b are integers

Complete the square.We want a quadratic we can simplify.Halve the linear term coefficient (6) and square it.Add it to the (x 2 +6x) term and subtract it from the 7.x 2 +6x+(6/2) 2 -7-(6/2) 2 As you can see t...
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Answered by George B. • Maths tutor
19666 Views