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Simplify (5/x+1) + (6/x-5)

To combine these two fractions into one, you have to multiply the equation by the denominators in order to make a common denominator: 5(x-5)/(x+1)(x-5) + 6(x+1)/(x+1)(x-5) Now that the denominators are the s...
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Answered by Emma L. • Maths tutor
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On a pirate ship, a 1.6m plank is held at one end to the ship. A 65kg pirate walks the plank with his 1.1kg parrot following 40cm behind him. What is the total clockwise moment acting on the plank when the pirate reaches the end of it?

Moment = force x distance Pirate: force = 65 x 9.81 =637.65 distance = 1.2 moment = 637.65 x 1.6 =1020.24 = 1020 Nm (3 sig fig) Parrot: force = 1.1x 9.81 = 10.791 distance = 1.6 - 0.4 = 1.2 moment = 10.791 x...
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Answered by Amy S. • Physics tutor
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Describe the structure and bonding of sodium chloride.

Sodium chloride has a giant ionic lattice structure with ionic bonding. There are electrostatic forces of attraction between the Na + ions and the Cl - ions.
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Answered by Amy S. • Chemistry tutor
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Comparing aluminium and magnesium, which has a lower first ionisation energy? Explain.

Aluminium has a lower first ionisation energy than magnesium. This is because it's outer electron is in a p-orbital in comparision to magnesium's outer electron which is in an s-orbital. The outer electron o...
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Answered by Amy S. • Chemistry tutor
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How do I approach an A Level Spanish Literature essay?

It helps to be formulaic when approaching a broad essay title such as those found in an A Level Spanish paper. For example, if faced with the AQA June 2016 question - ¿Se puede decir que la representación de...
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Answered by Olivia H. • Spanish tutor
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