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## Main Question or Discussion Point

Hi there,

As part of my A2 physics coursework, i need to calculate the energy received by a water-antifreeze solution.

Basic setup: Lamp with 40W light bulb at a distance of 5cm away from an aluminium canister, which is filled with 100ml of water-glycol solution (at different concentrations), and time the temperature change of the solution over a period of 15minutes.

I thought that i could simply apply the E=mc(delta)T equation, where i assumed that all the energy supplied by the lamp (36000J over the 15minute period) was received by the solution. I however know that this was not the case, and was wondering what i can do to make my calculations a little more accurate. i.e. i would like to find out approximately what amount of energy is received by the aluminium canister first, and then use that energy as which is received by the water.

I have included the distance from the canister to the lamp, 5cm, incase i can apply some sort of thermal radiation equation?

EDIT: Basically i want the best way to estimate the amount of energy received by the water-antifreeze solution...

Please help me out asap

Thanks

Joe

As part of my A2 physics coursework, i need to calculate the energy received by a water-antifreeze solution.

Basic setup: Lamp with 40W light bulb at a distance of 5cm away from an aluminium canister, which is filled with 100ml of water-glycol solution (at different concentrations), and time the temperature change of the solution over a period of 15minutes.

I thought that i could simply apply the E=mc(delta)T equation, where i assumed that all the energy supplied by the lamp (36000J over the 15minute period) was received by the solution. I however know that this was not the case, and was wondering what i can do to make my calculations a little more accurate. i.e. i would like to find out approximately what amount of energy is received by the aluminium canister first, and then use that energy as which is received by the water.

I have included the distance from the canister to the lamp, 5cm, incase i can apply some sort of thermal radiation equation?

EDIT: Basically i want the best way to estimate the amount of energy received by the water-antifreeze solution...

Please help me out asap

Thanks

Joe

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