The longer the house remains cold, the more energy it saves compared to the energy lost that comes when the heater is humming along at its normal temperature [sources: Department of Energy, Sierra Club]. The same principle holds for home cooling purposes. The higher the air temperature rises...
In Picture 1, it tells us what happens, how much time it takes to dissolve (溶解)the sugar when tem-perature increases.In Picture 2, it's a room.The heater is working all the time.Can you get any knowledge of how the convection current (对流)is born?
The ice on the front windshield of the car had formed when moisture condensed during the night. The ice melted quickly after the car was warmed up the next morning because the defrosting vent, which blows only on the front windshield, was turned on full force. Which of the following, if ...
California, a few miles south of the lake at the juncture of Highways 89 and 50, where he could see the endless stream of cars. An otherwise even-keeled guy, he logged on to Facebook and vented. “Let’s rally,” he posted on his page, adding that he wanted to put together ...
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