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How can I sketch a graph?

There are a number of steps before sketching a graph. We will look over bits of theory and then do some examples (I'll show the examples in the online lesson space) First we have to find the x-intercept and ...
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Answered by Razvan T. • Maths tutor
3861 Views

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
2551 Views

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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What is a surd? How would you go by simplifying a surd?

A surd is an irrational square root which cannot be reduced to a whole number when squared. When you think of the square root of 4, the answer is 2. When you think of the square root of 9, the answer is 3. H...
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Answered by James O. • Maths tutor
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Outline the process of eutrophication

Eutrophication occurs when nitrate fertilisers are carried by ground water into lakes and ponds. The fertliser encourages algal growth in the water, which in turn blocks out sunlight. This causes submerged p...
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Answered by India G. • Biology tutor
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