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A kettle boils 0.6kg of water. After some time the temperature of the water has decreased to 83 degrees. The specific heat capacity of water is 4200J/kg. Calculate the energy transferred to the surroundings.

The variables we are given are mass (m), time (t), temperate CHANGE (delta T) and SHC (c) and we are asked for energy. Think of the equations for energy we know: mgh, 1/2mv², mcdeltaT...the fir...

Answered by Alice D. • Physics tutor

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How do I begin a composition? How do I score top marks in my coursework?

Composition can often seem a daunting task, and many GCSE students simply do not know how where to begin. In truth, GCSE composition can be broken down into manageable, methodical steps. Examiners are loo...

Answered by Patrick D. • Music tutor

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Simplify (3x^2-8x-3)/(2x^2-6x)

(3x + 1)/(2x)I would use the whiteboard to explain the process

Answered by Romeo E. • Maths tutor

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Find the roots of the equation (x^2+5x+4)/(x^2-3x+2)

Finding the root means finding the solution when the equation is equal to zero, so when (x^2+5x+4)/(x^2-3x+2)=0. This happens when the numerator x^2+5x+4 is equal to zero so we have to find the roots. To ...

Answered by Charlotte S. • Maths tutor

2451 Views

What are the definitions of a)voltage and b)current?

a) Current is defined as the rate of flow of charge; I = Q/t (Current is charge/time).b) Voltage is an electromotive force which drives the charge around the circuit. A potential difference between two po...

Answered by Shrey C. • Physics tutor

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