Change in Barometric Height with position
Biswaroop Dasgupta asks: “How would the barometric height change when a mercury barometer is taken to a mine? Give reasons to explain.” Answer: Barometer is a device used to determine the atmospheric...
View ArticleSURFACE TENSION
How does surface tension act? What is basic cause? Answer: Surface tension is the property of a liquid by virtue of which its free surface behaves like a stretched elastic membrane. When a blade is...
View ArticleHeat! Heat! Heat!
Thermal vibration of a segment of protein alpha helix. The amplitude of the vibrations increases with temperature. (Photo credit: Wikipedia) A glass ball at -10 degrees C is placed in 500 ml of water...
View ArticlePressure, Thrust, Area and Pascal’s Law
“In Pascal’s law we find that pressure does not increase with area. But when we study about pressure, we learn that pressure is inversely proportional to area. How is this possible? Please explain.”...
View ArticleQuestion Bank in Class XI Physics – Mechanical Properties of Solids
Important Points to remember: Deforming forces are external force applied on a body to change its size or shape. Restoring force is the internal force developed in a body trying to bring it back to the...
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