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i just got and topt up a t moble free txt and inet sim card i had to up my sim card £10 to get my free txts but still aint got them so could sum one tell me when they mite arive as i cant get a clear answer nowhere else

the question says tha "state in words the meaning of the following thermochemical equation C2H4(g)+3O2(g)->2CO2(g)+2H2O(l) Delta "H" is -1411kj i think it should be not just describing about what we got for the products or this is exothermic reaction, because my teacher said that its wrong...

i was just asked to think about the solution to the ozone depletion and of course the solution to this is to reduce the harmful substance called CFC however the problem would be that i have to find the solution that let the kids at age of 5 can take part in that. i know that for us, as we are...

i'm just confused with the physics as the question states that "make an estimate of the area under the curve. how does the area compare to the total displacement for the same number of intervals?" my answer is that the area under the curve is approximately 24.95cm^2 comparing the estimated area...