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Explain the nuclear model

The atom consists of three sub-atomic particles: Protons; Neutrons and electrons. Protons and neutrons are in the nucleus of the atom and the electrons occupy the electron shells around the nucleus. Electron...
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Answered by Emily P. • Chemistry tutor
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Describe and explain mitosis

Mitosis is the division (and multiplication) by body cells or somatic cells (cells that arent gametes.) Gametes- sperm and egg; undergo meiosis Somatic cells- body cells; undergo mitosis . Both the daughter ...
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Answered by Emily P. • Biology tutor
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How does water enter and move up the plant?

It moves up through a process known as transpiration . This is when water leaves the through the stomata , creating a negative hydrostatic pressure which pulls the water up through the xylem . The properties...
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Answered by Emily P. • Biology tutor
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Expand and simplify 3(m + 4) – 2(4m + 1)

Multiply through the 3 of the first bracket to get 3m +12. Then multiply out the second bracket by -2 to get -8m -2. Write it out in a line: 3m + 12 - 8m -2 Simplify: -5m +10 Divide by -5 again to simplify f...
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Answered by Tutor49422 D. • Maths tutor
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A bag contains 5 blue marbles and 5 red marbles. If marbles are NOT replaced after being selected from the bag, what is the probability (in percentage) of picking 2 red marbles? Give your answer to one decimal place.

As there are a total of 10 marbles in the bag, then the probability of picking a red marble is 5/10. When the next marble is selected, there are only 9 marbles left in the bag since the red marble has not be...
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Answered by Peter B. • Maths tutor
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