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Write 16 × 8^2x as a power of 2 in terms of x

16 = 4 2 = (2 2 ) 2 = 2 4 8 = 2 3 , therefore 8 2x = 2 3(2x) = 2 6x 2 4 x 2 6x = 2 4 + 6x
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Answered by Prahlad M. • Maths tutor
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In the early 20th Century the plum pudding model of the atom was replaced by the nuclear model of the atom, explain why this happened.

The plum pudding model defined the atom as a particle in which the charge and the mass of the atom was spread evenly. An experiment was set up in which alpha particles where shot to a thin gold foil. The exp...
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Answered by Joel P. • Physics tutor
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Express the following in partial fractions: (x^2+4x+10)/(x+3)(x+4)(x+5)

(x^2+4x+10)/(x+3)(x+4)(x+1) = A/(x+3) + B/(x+4) + C/(x+1) [A(x+4)(x+1) + B(x+3)(x+1) + C(x+3)(x+4)]/(x+3)(x+4)(x+1) = (x^2+4x+10)/(x+3)(x+4)(x+1) [A(x+4)(x+1) + B(x+3)(x+1) + C(x+3)(x+4)] = (x^2+4x+10) A(x^2...
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Answered by Alessandro S. • Maths tutor
3347 Views

What is the best way to approach an essay plan in a time-pressured exam based environment?

Step 1: firstly take a breath. Take ten seconds before opening the exam paper to take a deep breath and calm and focus your mind before tackling the question. Step 2: Choose a question that you feel comforta...
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Answered by Isabel M. • History tutor
1797 Views

Describe how oxygen in the air reaches capillaries surrounding alveoli in the lungs. Details of breathing are not required. (AQA Biol. 2016)

Oxygen diffuses from the air where it is present at a higher concentration and pressure, to the lungs where it is at a lower concentration and pressure - we say it moves 'down' these gradients; high to low. ...
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Answered by David M. • Biology tutor
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