Does going from hot to cold cause colds?The article presents an answer to a question about whether exposing a human body to extreme temperature swings can cause people to become ill.MitchellHeidi(AUTHOR)EBSCO_bspWall Street Journal Eastern Edition...
As I was growing up, we were often on the move. I had to admit that moving so often made me feel lonely. But my mother did everything she could to help me feel happy. In fact, so much traveling was really a good thing because it made us close. I respect my mother so much as ...
What happens when cold and warm air currents meet? Why does water expand when frozen? How does diffusion vary from gas to liquid to solid? Explain how convection currents are produced in the air. How does salinity affect density? How does heat move from one place to another in the troposph...
Why does warm, moist air from clouds when it rises? An electric fan not only does not decrease the temperature of the air, but it actually increases air temperature. How can you then explain that you are cooled by a fan on a hot day?
However, if people move from their home country to another to live there forever (永久地), the word changes from emigrate to immigrate in the English language. Then the word immigration is born. Isn’t word-making of the English language interesting? And can this process (过程) of finding...
When lots of sea water gets hot in the summer sun it evaporates into the air. This makes the air hotter. When the air gets warm enough it starts to move higher up into the sky. Then cooler air around it rushes in. It fills the space that is left. After the air gets warmer it ...
Why does warm, moist air from clouds when it rises? Why do hot molecules move faster than cold molecules? When a tire bursts, the air coming out is cooler than the surrounding air. Explain. Why is a very slow process treated as isothermal and a rapid process adiabatic? Why a very sl...
Where does the wind come from? What makes the wind move all the time?Scientists tell us that the sun makes it move and blow. When the sun shines on theearth, it makes the earth hot. Then the earth makes the air hot. When the airbecomes hotter, it also becomes lighter. The light ...
On the outside, the outer walls and the roof tiles are hotter than the atmosphere around them, so the cold air near to them heats up and flows away by convection. Your house may seem like a big complex space with lots going on inside in but, from the point of view of physics, it...
Physics is simple: It takes more energy to heat a car from 30 to 70 degrees F than it does to cool it from 90 to 70 degrees F. Either way, you need to use a certain amount of energy to add or remove heat from the cabin. Air conditioning in an EV has a fairly minimal impact ...