Tag: physics
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What is Refrigerator
Prior to the invention of refrigerators, food preservation imposed serious constraints. The best options were to suspend food in rivers, wells, or at the bottom of lakes, and absent these tactics, stable foods were heavily salted, spiced, pickled, or dried to prevent bacterial growth. With the industrial age, we began to understand thermodynamic cycles and—through…
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Why does not Aircraft Cabin Pressurized as Ground Level
Have you got your ear numb when you’re moving from one altitude to another one? It may happen when you use high elevator or mostly when you’re inside a takeoff or landing aircraft. In normal circumstances the air pressure is the same on both sides of our eardrums. But when the pressure in our environment changes significantly, the…
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How Tree Got Its Masses
Tress is one of the biggest thing that take place on our earth. Ever thinking how the tress in front of your house become so big and have a massive mass? Where are the mass come from? Put it in your mind and try to find it ! As Antoine Lavoisier said that mass in a closed system…
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VA vs Watt
You may see power unit that written as KVA and KW. Can you guess which one is true? The answer lead to both of them are true. KW will have the same meaning as KVA when the KVAR component is 0. Thinking as a perpendicular triangle with KW and KVAR as its perpendicular side and…