according to the first law of thermodynamics energy is neither created nor destroyed. what dose this law tell you about a substance or object that is emitting light?​

The image shows the process of which is used in nuclear power plants. photo attached

What are the other two pieces of glassware you used in this experiment that you could obtain hundredths digit accuracy?

Fill in the blanks for the following statements: the rms speed of the molecules in a sample of h2 gas at 300 k will be times larger than the rms speed of o2 molecules at the same temperature, and the ratio µrms (h2) / µrms (o2) with increasing temperature.