Please please please answer this?
Why ice floats on water?
Cotton being a solid,floats on water why?
When ice melts,its temperature remains constant?
How temperature and humidity effects the rate of evaporation?
Answers
Answered by
1
Why ice floats on water?
Ans) due to the ice structure which is hexagonal in shape have space between them and these structure are filled with gas the ice floats on water.
Cotton being a solid,floats on water why?
Ans) at the density of the Cotton is lower then water density.
When ice melts,its temperature remains constant?
Ans)in a phase change energy is used to break the bonds between the molecules of the substance not in increasing its temperature.
How temperature and humidity effects the rate of evaporation?
Ans) temperature is directly proportional to evaporation so inversely proportional to humidity
Ans) due to the ice structure which is hexagonal in shape have space between them and these structure are filled with gas the ice floats on water.
Cotton being a solid,floats on water why?
Ans) at the density of the Cotton is lower then water density.
When ice melts,its temperature remains constant?
Ans)in a phase change energy is used to break the bonds between the molecules of the substance not in increasing its temperature.
How temperature and humidity effects the rate of evaporation?
Ans) temperature is directly proportional to evaporation so inversely proportional to humidity
Answered by
3
hii dear!!
here ur answer
Ans..1'-Most materials become more dense the colder they get.
Water is a weird one. Water does get denser as it cools, up to a point. As water becomes cold enough to freeze, the water molecules start to lock into place as they solidify into ice. Due to the structure of the water molecules, this causes the water to expand slightly (about 9%) as it solidifies.
So, the molecules are slightly further apart when in solid form than when in liquid form.
Because the same mass of water is now occupying more space, it will float in liquid water.
It will float with about 9% of it’s volume poking above the surface, I believe.
Salt water vs fresh water would change this slightly, as salt water is denser than fresh water (…because of the salt).
Ans..2..because its density is less compared to that of water. The particles of cotton are very light in weight. However, after some time, the cotton sinks in water. This is because, the water has been absorbed by the cotton, and the particles of cotton have become heavy. Then, they cannot absorb any more. So, they completely sinks to the bottom of the water after a certain time period of time.
Ans..3..We know that 0°C is the melting point of ice. At this temperature, ice starts melting by absorbing the latent heat from the surroundings (which must be at higher temperature).
Dyring the absorption of latent heat, all the heat is utilizes for phase change and thus there is no temperature rise. So the water formed after melting will also be at 0°C.
Ans..4..There are many evaporation equations and as far as I know all incorporate the air temperature, water temperature, wind speed and relative humidity.
One such equation is Evaporation from Water Surfaces equation. Unfortunately they do not all give the same answers. With the engineering toolbox one you have to know something about humidity ratios (which I can easily calculate for you should you need them). If relative humidity is low then evaporation is higher.
#hope.help u plz mark brainlist#
_______________________
here ur answer
Ans..1'-Most materials become more dense the colder they get.
Water is a weird one. Water does get denser as it cools, up to a point. As water becomes cold enough to freeze, the water molecules start to lock into place as they solidify into ice. Due to the structure of the water molecules, this causes the water to expand slightly (about 9%) as it solidifies.
So, the molecules are slightly further apart when in solid form than when in liquid form.
Because the same mass of water is now occupying more space, it will float in liquid water.
It will float with about 9% of it’s volume poking above the surface, I believe.
Salt water vs fresh water would change this slightly, as salt water is denser than fresh water (…because of the salt).
Ans..2..because its density is less compared to that of water. The particles of cotton are very light in weight. However, after some time, the cotton sinks in water. This is because, the water has been absorbed by the cotton, and the particles of cotton have become heavy. Then, they cannot absorb any more. So, they completely sinks to the bottom of the water after a certain time period of time.
Ans..3..We know that 0°C is the melting point of ice. At this temperature, ice starts melting by absorbing the latent heat from the surroundings (which must be at higher temperature).
Dyring the absorption of latent heat, all the heat is utilizes for phase change and thus there is no temperature rise. So the water formed after melting will also be at 0°C.
Ans..4..There are many evaporation equations and as far as I know all incorporate the air temperature, water temperature, wind speed and relative humidity.
One such equation is Evaporation from Water Surfaces equation. Unfortunately they do not all give the same answers. With the engineering toolbox one you have to know something about humidity ratios (which I can easily calculate for you should you need them). If relative humidity is low then evaporation is higher.
#hope.help u plz mark brainlist#
_______________________
Jimmy1111:
It's okkkkkkkkkk
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