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What is the wavelength of a wave travelling at 20ms^-1 with a time period of 0.2s

v = f x lambdatherefore lamba = v/ff=1/Tf = 1/0.2 = 5Hzlambda = 20/5 = 4m
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Answered by Hannah C. • Physics tutor
4114 Views

Solve the simultaneous equations (1) 2a - 5b = 11 (2) 3a + 2b = 7

(1)x2 4a - 10b = 22(2)x5 15a + 10b = 35(1) + (2) 19a = 57a = 3sub a = 3 into (1)2(3) - 5b = 116 - 5b = 11-5b = 55b = -5b = -1
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Answered by Hannah C. • Maths tutor
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A picture is bought at a sale for £40. It is laster sold for £50. What is the percentage profit?

percentage profit = percentage increasepercentage increase = (difference/original) x 100 = (50 - 40)/40) x100=25%
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Answered by Hannah C. • Maths tutor
6936 Views

How can I prepare for my LNAT?

The best way to prepare is through practice, there a hundreds of LNAT books that are available for students and I suggest reading through them and completing the questions thoroughly. The multiple choice par...
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Answered by Shannon M. • LNAT tutor
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How do I start my personal statement?

The Universities have to go through thousands of applications a day so you need to grab their attention from the first sentence of your personal statement, make them want to find out more about you. I believ...
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