Skating on ice shows that on increasing the pressure, the melting point of ice decreases. The pressure exerted by the skater lowers the melting point of the ice underneath the skate blades, causing a thin layer of ice to melt, ...
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When two pieces of ice are pressed together, they stick together because the increased pressure lowers the melting point of ice at the point of contact. This allows a thin layer of ice to melt, creating a temporary liquid bridge ...
During summer days, water kept in an earthen vessel stays cool due to evaporation. The porous nature of the earthen material allows water to seep through and evaporate from its surface, drawing heat energy from the surrounding water and keeping ...
The process of making camphor vapor from solid camphor is called sublimation. Sublimation is the direct transition of a substance from its solid phase to its gas phase without passing through the liquid phase. When solid camphor is heated, it ...
Dew is not formed on a strong windy night because the rate of evaporation is fast. The movement of air removes the thin layer of moisture near the ground, preventing dew formation.
It takes more time to cook potatoes on mountain tops because atmospheric pressure is low. At higher altitudes, the reduced atmospheric pressure lowers the boiling point of water, causing water to boil at temperatures lower than at sea level. This ...
The reason why snow covered on mountains does not melt simultaneously due to the heat of the Sun is because it reflects most of the heat received from the Sun. The reflective properties of snow prevent it from absorbing much ...
The hairs of the shaving brush stick together when taken out of water due to surface tension. Water molecules at the surface of the hairs attract each other, causing them to cling together. This phenomenon is a result of cohesive ...
When kerosene oil is added to stagnant water, mosquitoes reduce because it interferes with the breathing of the larvae. The thin layer of oil formed on the water’s surface blocks the larvae’s access to air, effectively suffocating them. This disrupts ...
The shape of a raindrop becomes spherical primarily due to surface tension. Surface tension causes water molecules at the surface to contract, pulling the raindrop into the shape with the least surface area, which is a sphere. This phenomenon occurs ...