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A wave with a constant velocity doubles its frequency. What happens to the wavelength?

The relationship between velocity, frequency and wavelength is given by: v=fλ. In this case, we have: v=fλ 1 and v=2 fλ 2 .Since the question states that the velocity is constant, we can write the equality: ...
TD
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5 tins of soup have a total weight of 1750 grams. 4 tins of soup and 3 packets of soup have a total weight of 1490 grams. Work out the total weight of 3 tins of soup and 2 packets of soup.

To answer this question you need to write down and solve an equation. Let's call t a tin of soup and p, a packet. We have: 5t=1750 and 4t+3p=1490. We want to know how much is 3t+2p. 1. Isolate t to find valu...
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Answered by Tutor164604 D. • Maths tutor
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CuCl2 + 2NaOH --> Cu(OH)2 + 2NaCl. 100kg of CuCl2 reacts with excess Sodium Hydroxide. 50kg of Sodium Chloride is produced. Calculate the theoretical yield of Sodium Chloride, and hence the percentage yield of Iron in this reaction.

Theoretical Yield of NaCl = 86.7kg (3sf)Percentage Yield of Iron = 57.7% (3sf)
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Answered by Vishvan N. • Chemistry tutor
4301 Views

expand and simplify x(3x-2)(x+1)

first expand the brackets (3x-2)(x+1) to get 3x 2 -2x+3x-2, then we can simplify this to get 3x 2 +x-2.Then multiply this by x to get the final answer: 3x 3 +x 2 -2x.
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Answered by Natalia A. • Maths tutor
10017 Views

Bananas cost 30p each. Oranges cost 45p each. Write an expression, in pence, for the cost of x bananas and y oranges..

Each banana cost 30p so the total price for bananas will be "number of bananas x 30". Here, bananas are called by the variable x so this number can be written as "30x" and will change dep...
LP
Answered by Léa P. • Maths tutor
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