Radioactivity.
We can watch their radioactive decay to determine their half life.
Answer:
The evidence showing that there is a chemical reaction taking place is the instantaneous temperature drop once the cold pack is shaken.
Explanation:
When an athlete applies a cold pack to the injury, they shake it before, mixing the water and <em>ammonium-nitrate fertilizer</em> inside the cold pack. This mixing is an endothermic reaction, which means it absorbs heat. In turn, the temperature falls to 35 F for around 10 minutes.
Answer=4
Only solids can create regular geometric patterns... CO2 is a gas, H2O is a liquid and Sodium Chloride doesn't count because it's dissolved in a solution...
Complete combustion of an alkane (methane)
You're essentially burning CH4 in the excess presence of oxygen gas, which results in the liberation of water and carbon dioxide
Answer:
it depends on the material of the bowl. if the material is a good heat conductor, then it is a bad insulator vice versa.