Freeze-Thaw Weathering
This action can widen the cracks in the rock, and when the temperature rises above freezing, the ice thaws, allowing the water to seep further into the cracks. As this process of freezing and thawing happens repeatedly, the rock begins to weaken and eventually breaks apart into angular fragments.
Explanation:
Boiling point is the temperature at which vapor pressure of a liquid becomes equal to the atmospheric pressure.
More strong interactions present in the atoms of a compound more heat is required to break it. Hence, greater will be its boiling point.
As the boiling point of oxygen is 90 K so, at a temperature greater than it will change the state of oxygen from liquid to gas.
Similarly, the boiling point of nitrogen is 77 K so, at a temperature 95 K the state of liquid will also change from liquid to gas.
Answer:
The halogen bulb lasts longer because the filament lasts longer. It can have twice the life of an incandescent and use the same amount or slightly less (10%) electricity.
Explanation:
When you burn a log in your fireplace you are converting c<span>ellulose into carbon dioxide and water.
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Wood is made from cellulose. When wood burns, cellulose reacts with oxygen from the air and it forms carbon dioxide and water vapor.
The reaction of the combustion of glucose is as follows:
C₆H₁₂O₆ + 6O₂ = 6 CO₂ + 6H₂O
When wood burns, we notice that it slowly disappears because it passes into the mentioned gases. The ash that is created is part of the wood that did not burn.
Answer: Some signs of a chemical change are a change in color and the formation of bubbles. The five conditions of chemical change: color chage, formation of a precipitate, formation of a gas, odor change, temperature change.
