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Calculate the kinetic energy of a proton moving at 95% of the speed of light. (c = 3x10^8 m/s, m_p = 1.67x10^-27 kg) [4 marks]

KE = 0.5mv 2 [1] v = 3x10 8 * 0.95 = 2.85x10 8 [1] KE = 0.5 * 1.67x10 -27 * (2.85x10 8 ) 2 [1] KE = 6.782 x10 -11 J [1]
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Answered by Tom F. • Physics tutor
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Describe what is meant by the following musical textures: 1) homophonic, 2) polyphonic, 3) call and response.

Homophonic texture is when the music sounds 'as one', such as block chords, where all instruments change notes at the same time. Polyphonic means 'many sounds'. The instruments playing may all have different...
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Answered by Tom F. • Music tutor
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Factorise the following expression: 2(x^4) + 4(x^2) - 32(x^3)

2x 2 (x 2 + 2 - 16x)
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Answered by Tom F. • Maths tutor
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Can two shelves of 0.72 meters long each store 50 30mm wide textbooks?

First, convert the units so you can compare more easily. 0.72m = 72cm = 720mm So 1 shelf is 720mm and 1 textbook is 30mm wide. To find the maximum number of books that can be stored on a shelf, you divide th...
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Answered by Valerie L. • Maths tutor
3777 Views

How do radians work? Why can't we just keep working with degrees in school?

Degrees are a made up unit; mathematicians simply decided that a complete revolution of a circle has 360 degrees, without that number actually meaning anything. Tecnically any number could have been picked t...
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Answered by Hans D. • Maths tutor
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