Which process most likely takes place when the kinetic energy of molecules overcomes the intermolecular forces?
a) boiling
b) condensation
c) freezing
d) solidification

a) boiling

Explanation:

The major difference between solids, liquids and gases is:

a) intermolecular forces [ the order is solid>liquid>gas]

b) kinetic or thermal energy. [the order is gas>liquid>solid].

thus when the kinetic energy is more and intermolecular forces are less it means there is a change from

i) solid to liquid

ii) solid to gas

iii) or liquid to gas

the given processes observe following phase changes:

a) boiling : liquid to gas

b) condensation : gas to liquid.

c) freezing : liquid to solid.

d) solidification:liquid to solid.

it can be observed without changing the identity of the object.

it depends on what substance you're talking about as well as many other factors. in quantum mechanics, the observation of particles affects the observers ability to measure certain properties. for example: you can know the velocity of a particle, but you can't know it's position; or you can know it's position, but not it's velocity. it's like trying to find out where a grain of sand is by throwing other grains of sand at it. once you find out where it is, it's been moved. it's also like trying to find an answer to the question of whether or not a tree falling in a forest makes a sound if nobody is there to hear it. paradoxically, the only way to find out is to be there and hear it.

on passing the small ampere of electric current through the tube made of ar and hg of cfl generates uv rays which excites the fluorescent and thus emits the high radiation by consumption of just 5- 12 w in comparison to incandescent light which requires more power such as around 40 - 55 w to lighten.

moreover the life span of fluorescent or cfl is around 8000 h whereas the life span of incandescent is around 1200 h

hence, the building installed with incandescent lights bears more electricity bill.