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What is the power dissipated by a 12 Ohm resistor when 2A of current run through it?

We know P=IV and that V=IR. Therefore as we are only given I and R in the question we can make the substitution for V so that P=I 2 R. By plugging in the numbers we get: P=2 2 x 12= 48W (W=Watts, unit of Power)
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Answered by Ollie T. • Physics tutor
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expand y=(x+1)(x+2) and find what are the coordinates for x intercepts?

use the smile technique
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Answered by Sen H. • Maths tutor
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Simplify 4^2 x 2^4

4 2 = 2 2x2 =2 4 2 4 x2 4 = 2 8 Explanation: In order to simplify powers you need to get the same base number. In order to get this problem into the simplest form you will need to use 2 as the base number. 4...
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Answered by Jack N. • Maths tutor
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Explain diffusion?

This is the net passive movement of molecules down the concentration gradient from an area of high concentration to an area of low er concentration, through a partially permeable membrane.
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Answered by Jack N. • Biology tutor
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How do you describe the greenhouse effect?

The greenhouse effect is a process that warms the planets temperature to warmer than it would be without an atmosphere. It makes the planet a comfortable place to live. It works like a greenhouse or glasshou...
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