coal with a heat value of 27MJ/kg is used to heat 250kg water. If the specific heat capacity of water is 4,187KJ/kg °C and 1,25kg coal is burned. Calculate the temperature increase of the water if the installation efficiency is 70%?​

Which of the following is an example of motion in two dimensions?

The ph is the a.independent variable b.the dependent variable c.control group

Global warming will produce rising sea levels partly due to melting ice caps but also due to the expansion of water as average ocean temperatures rise. to get some idea of the size of this effect, calculate the change in length (in m) of a column of water 1.45 km high for a temperature increase of 1.12°c. assume the column is not free to expand sideways. as a model of the ocean, that is a reasonable approximation, as only parts of the ocean very close to