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A 6.0W bulb is connected to a source of 480J of energy. Assuming the system is 100% efficient, and the bulb runs at full power, how long can it stay lit?

Bulb power = 6.0W - Energy provided = 480J - Use equation P = E / t (Power = energy/time) where power is in watts, energy is in joules, and time is in seconds - Rearrange the equation to give t = E / P (time...
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Answered by Lily W. • Physics tutor
4164 Views

What is the statement 'God is Dead' talking about, and how is it relevant to the rise in Atheism?

Nietszche came up with the phrase 'God is Dead' in his book The Gay Science. By saying God is dead he is directly relating to the rise in Atheism and how more and more people were starting to become dissolus...
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Answered by Lucy D. • Philosophy tutor
2243 Views

How do you get full marks for evaluation in the 16 or 24 mark questions?

To gain full evaluation marks in a psychology essay you have to have A02 and A03 marks. A02 marks would be other studies that you have learnt about in psychology that contradict or support your original (fac...
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Answered by Lucy D. • Psychology tutor
8700 Views

Solve the following pair of simultaneous equations: 1. 3x + 2y = 9 2. 6x + 5y = 21

We can solve this pair of simultaneous equations using substitution. To do this, we firstly have to rearrange one equation to get one variable on its own. For example, we can subtract 2y from each side of th...
MC
Answered by Mark C. • Maths tutor
4606 Views

How would you differentiate 3x^4 - 2x^2 + 9x - 1

First we follow the "times by the power and take one from the power" rule. This is the easiest way to remember how to differentiate anything. So (3x4)x (4-1) -(2x2)x (2-1) +(9x1)x (1-1) -(1x0)x (0-...
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Answered by Cathy E. • Maths tutor
3830 Views