The first statement of the 2nd law of thermodynamics - heat flows spontaneously from a hot to a cold body - tells us that an ice cube must melt on a hot day, rather than becoming colder. We have already seen from our own experience that the flow of heat through conduction occurs when fast (hot) atoms collide with slow (cool) atoms, transferring some of their kinetic energy in the process. When you bring two objects of different temperature together, energy will always be transferred from the hotter to the cooler object. The objects will exchange thermal energy, until thermal equilibrium is reached, for example until their temperatures are equal. We say that heat flows from the hotter to the cooler object. Heat is energy on the move. When we try and figure out which lake is freezing first we have to think...heat or energy moves from hot to cold. If there are warm spots in the lake the energy is going to warm the cooler water. When the energy comes to an equal temperature with the cooler water the energy is held in place or frozen. Think about frozen waves. The warm water underneath forces the warm water to melt the freezing water, yet when their temperature becomes equal, like say 10 degrees F. The warm and cold water are the same temperature and they have become frozen until more energy moves toward these frozen molecules to melt them. When the sun goes down and the heat source is removed energy is frozen until the sun comes up and warms the molecules and the motion starts all over again. The heated molecules will warm the colder ones and repeat until you have water flowing again. This little baby is warm, he is being put in a bath of water that isn't as warm as his body. The mother can remove the baby and warm the water up a bit more. Baby will be happy if the water is equal to his body heat. The warm water will move to the baby's body temp and then to the room temperature, baby's body temperature will also go out into the room cooling the baby. That's why the baby can't stay in the bath for too long because he will grow cold while the room grows warmer. Think about it...heat always moves from hot to cold, always from hot to cold. And REPEAT!!
7 Comments
Luke
1/29/2018 06:05:24 pm
Ha me first people comment on this thing. Me grammar good !!!🤪
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MaryGrace/Fred
1/29/2018 07:12:24 pm
I showed my mom and dad at the freezing waves. They said it was cool and my mom said she didn't want that to happen on our cruise!!! Then I showed my parents the baby. They laughed but my mom felt sorry while laughing. And yes, your grammar very good Luke! I thought you said you never commented! Whatever... And the thing you are commenting on is Mrs. Taylor's Blog!!!
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Jonah
1/29/2018 07:23:26 pm
I was talking to my sister about energy, heat kept coming to mind.
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Sadie
1/30/2018 07:29:38 am
Good job on the blog Mrs. Taylor!!!
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Errol
1/30/2018 07:43:13 am
I am going to show my mom the video of the frozen waves! I think it is so cool! I also feel bad for the baby but hey maybe that was the baby's first time in the water! I also brought a 2 liter bottle!
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David Biggs
1/30/2018 08:26:27 am
The frozen waves are cool. i`m exited for science! oh and wonderful grammar luke/lula haha :)
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Mrs. TaylorI love science! Everything about the world is interesting and never boring. I love to study plants, animals, insects, and people. My favorite subjects are my students who are the most unique organisms on the planet! Categories |