I would say A. Friction because it is the act of two things rubbing together.
Ex. Trying to make fire
Three other pairs of liquids having different molecular masses can be tested to see if the pattern of boiling points will continue.
The boiling point of a liquid refers to the temperature at which the vapor pressure of the liquid is equal to the atmospheric pressure. Usually, the boiling point is affected by the nature of intermolecular forces in the compound.
In order to confirm whether or not the pattern of boiling point is correct, We have to get about three more pairs of compounds in which one has a lower molecular mass than the other and observe if the pattern in the values of boiling point will continue as predicted.
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One method that may be used to replace traditional damming is the use of sub-surface dams to prevent the environmental consequences of dams while still harnessing the flowing water.
<h3>What is a sub-surface dam?</h3>
- Just as it sounds, it is a dam that is built underneath the surface.
- The aim is to harness the energy of flowing groundwater.
- This results in less water becoming stagnant, as with traditional dams.
- They also reduce the risk of floods and the rate of evaporation of the water.
- This all results in many positive environmental and ecosystem benefits.
Therefore, we can confirm that the building of a sub-surface dam would result in less water being lost to evaporation, as well as the ecosystem benefits of not completely stopping the flow of water the way a traditional dam does.
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Answer:
is present in solution
Explanation:
In presence of HCl, metal ions present in solution will be precipitated as metal chloride provided these salts are either insoluble or sparingly soluble in water.
According to solubility rule, all chlorides are soluble except AgCl, 
and 
In all probability, addition of HCl in solution will result formation of AgCl, 
and 
. But only AgCl is insoluble. Hence it will get precipitated out of solution.
So, is present in solution
Balanced reaction: 
