What is full form of LPG ?
liquefied petroleum gas (LPG)
MATTER IN OUR SURROUNDINGS
What is Dry ice ?
Solid CO2 is called Dry ice ?
What is evaporation?
Particles of matter are always moving and are never at rest. At a given temperature in any gas, liquid or solid,there are particles with different amounts of kinetic energy. In the case of liquids, a small fraction of particles at the surface, having higher kinetic energy, is able to break away from the forces of …
FACTORS AFFECTING EVAPORATION
the rate of evaporation increases with–•an increase of surface area:We know that evaporation is a surface phenomenon. If the surface area is increased, the rate of evaporation increases. For example, while puttingclothes for drying up we spread them out.• an increase of temperature:With the increase of temperature, more number of particles get enough kinetic energy …
What happens when you pour some acetone (nail polish remover) on your palm?
What happens when you pour some acetone (nail polish remover) on your palm?The particles gain energy from your palm or surroundings and evaporate causing the palm to feel cool. After a hot sunny day, people sprinklewater on the roof or open ground because the large latent heat of vaporisation of water helps to cool the …
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HOW DOES EVAPORATION CAUSE COOLING?
In an open vessel, the liquid keeps on evaporating. The particles of liquid absorb energy from the surrounding to regain the energy lost during evaporation. This absorption of energy from the surroundings make the surroundings cold.
Why do we see water droplets on the outer
surface of a glass containing ice-cold
water?
Let us take some ice-cold water in a tumbler. Soon we will see water droplets on the outer surface of the tumbler. The water vapour present in air, on coming in contact with the cold glass of water, loses energy and gets converted to liquid state, which we see as water droplets.
Why should we wear cotton clothes in summer?
During summer, we perspire more because of the mechanism of our body which keeps us cool. We know that during evaporation, the particles at the surface of the liquid gain energy from the surroundings or body surface and change into vapour. The heat energy equal to the latent heat ofvaporisation is absorbed from the body …
Bose-Einstein Condensate
Bose-Einstein Condensate: In 1920, Indian physicist Satyendra Nath Bose had done some calculations for a fifth state of matter. Building on his calculations, Albert Einstein predicted a new state of matter – the Bose-Einstein Condensate (BEC). In 2001, Eric A. Cornell, Wolfgang Ketterle and Carl E. Wieman of USA received the Nobel prize in physics …
PLASMA
Plasma: The state consists of super energetic and super excited particles. These particles are in the form of ionised gases. The fluorescent tube and neon sign bulbs consist of plasma. Inside a neon sign bulb there is neon gas and inside a fluorescent tube there is helium gas or some other gas. The gas gets …