#212 When spring finally arrives in the mountains

When spring finally arrives in the mountains - Physics

ChemistryExplain daily providing Q&A content “#212 When spring finally arrives in the mountains" in Physics, Ap physics 1 practice test, Best colleges for physics, Best physics books, Best physics schools

Get the Free Online Chemistry Q&A Questions And Answers with explain. To crack any examinations and Interview tests these Chemistry Questions And Answers are very useful. Here we have uploaded the Free Online Chemistry Questions. Here we are also given the all chemistry topic.

 ChemistryExplain team has covered all Topics related to inorganic, organic, physical chemistry, and others So, Prepare these Chemistry Questions and Answers with Explanation Pdf.

For More Chegg Questions

• Inorganic Chemistry
• Organic Chemistry
• Physical Chemistry

Free Chegg Question

When spring finally arrives in the mountains, the snow pack may be two meters deep, composed of 50% ice and 50% air. Direct sunlight provides about. 1000 watts/m2 to earth’s surface, but the snow might reflect 90% of this energy. Estimate how many weeks the snow pack should last, if direct solar radiation is the only source of energy.

 For More Chemistry Notes and Helpful Content Subscribe Our YouTube Chanel - Chemistry Explain  

Free Chegg Answer

During fusion of ice, the heat released by water and absorbed by the air is given by the following formula;

Here, m is the mass of ice and  is the latent heat of fusion of ice.

The snow will melt because of the heat energy coming from the sunlight.

Since  of energy reflects back hence only of energy is only being used to melt the snow.

Then, the amount of heat generated by the sunlight is used in melting of snow can be calculated as,

 

The depth of the snow pack would be,

The time for which the snow pack will exist would be,

Here, is the time, is the rate of heat transfer, is the area of heat transfer and is the solar energy flux

The amount of heat transfer during the melting of snow per unit area can be calculated as follows,

Here, is the mass of the snow pack, is the volume of the snow pack, is the density of the ice, is the depth of the snow pack and  is the latent heat of fusion of ice.

So, the time can also be written as follows,

Substitute,  for, for, for and for in the above expression to get the time required as follows,

Convert the required time from seconds to week.

Thus,  the snow pack will last.