Assume that you can heat water with perfect insulation (all the heat from combustion of ethanol is transferred to water). what is the volume of ethanol required to heat 200 ml of water by 10 °c? the density of ethanol is 0.78 g/ml, the specific heat capacity of water is 4.184 j∙g−1∙°c−1and the heat of combustion of ethanol is -1368 kj/mol. show your work.

A3.9 g aluminum foil ball with a charge of +4.1×10−9 c is suspended on a string in a uniform horizontal e⃗ field. the string deviates to the right and makes an angle of 30∘ with the vertical. part a part complete what information about the e⃗ field can you determine for this situation? what information about the field can you determine for this situation? only the magnitude of e⃗ only the direction of e⃗ both the magnitude and the direction of e⃗ none of the above previous answers correct part b determine the magnitude of the electric field. express your answer with the appropriate units. e e = nothing nothing request answer part c determine the direction of the electric field. determine the direction of the electric field. to the right to the left away from you toward you