Too Hot/Too Cold

Physics homework for 4/28/15:

It's Getting Hot in Here...♫

Today we took some notes about the three different temperature scales (Fahrenheit, Celsius, and Kelvin) and then we did a lab involving different temperatures of water for the rest of class :).

Water, milk, and chocolate all heat up at different rates - whether you use a stove, a microwave, or the sun to heat them up, they all heat up at different rates. Water is easy to heat, milk takes a while longer than water, and chocolate is the easiest of all of them to melt. Water takes ten minutes or so to boil on the stove and heats up at a steady rate, milk takes maybe fifteen minutes on the stove and is not as steady as water but not relatively bad, and chocolate usually begins to melt as soon as you throw it in the pan and heats up as well as melts away in a matter of minutes. But why do some substances heat up faster than others and why do some heat up at different rates? 

The physical state of the substances (gas, liquid, solid, plasma - usually just the first three) can affect the rate at which something heats up as not all substances have particles closely packed near each other. A solid probably heats up faster than a gas because the particles can transfer energy quickly as they are packed right next to each other, but a gas needs to take its time to find another gas particle to transfer energy to. It is like passing a ball to a group of people in a line, the people can quickly pass the ball because of how they are aligned. But if the people were scattered around on a field more energy is required to pass the ball and you have to throw the ball or run over to pass it to someone. So chocolate might melt faster and heat up quicker because it is a solid unlike milk and water. 

Whether the substance is pure or not is also a property that could affect heating rates. If I have pure water it will probably heat up fine, but salt water or water with some other solvent or whatever might take longer because the materials in the water can affect its melting/freezing point. Once that is affected, then heating rates change too. Plus, the salt and what not gets in the way of heating. So milk might heat up the slowest out of all of them because it is not pure like water, milk DEFINITELY is more than just milk - milk at least consists of water and other substances. 

Water is pure so it generally will heat up fine, but again, it is not a solid so it will have trouble passing energy from one particle to another. 

This is what I generally think, but I hope this is fine! Have a good day! :D Eat lots of choco--VEGETABLES not chocolate...

no but really eat chocolate <3 

ALL IN A DAY'S WORK BATMAN