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raketka [301]
3 years ago
10

1. Starting today. I will now change my behavior/s like ______________ because _________________

Physics
2 answers:
Ostrovityanka [42]3 years ago
6 0

Answer:

be mature, it's the only way to be called independent, I will help my parents with doing chores, you will meet new friends

Explanation:

it's just my own understanding

bulgar [2K]3 years ago
3 0

Answer:

1eating junk food

2 I will be a good girl

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Which of the following does not serve as a way to neutralize the charge in a body?
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4 years ago
If light energy to electric energy conversion using solar cells is 12 % efficient, how many square miles of land must be covered
umka2103 [35]

Complete Question

The light energy that falls on a square meter of ground over the course of a typical sunny day is about 20 MJ . The average rate of electric energy consumption in one house is 1.0 kW .

If light energy to electric energy conversion using solar cells is 12 % efficient, how many square miles of land must be covered with solar cells to supply the electrical energy for 350000 houses? Assume there is no cloud cover.

Answer:

The area is  A = 1.26 *10^{7} m^2

Explanation:

From the question we are told that

      The efficiency is  \eta =12%

      The number of houses is  N = 350000

       The light energy per day is E =  20 \ MJ

       The average rating of electric energy for a house is  E_h  =  1.0 \ k W =  1000W

   

Generally the electric energy which the solar cells covering 1 \ m^2 produces in a day is

       E_s =  \eta * E

           E_s =  0.12 * 20*10^{6}

          E_s = 2.4 MJ m^{-2}

Energy for required by one house for one day is  

        E_H  = E_h * 1 \ day  

       E_H  = 1000 * 24 * 3600  

        E_H  = 86.4 MJ

Energy needed for 350000 house is

      E_z = 86.4 *10^{6} *  350000  

     E_z = 3.02 *10^{7} MJ

The area covered is mathematically represented as

            A = \frac{3.02*10^{7} \ MJ}{2.4 \ MJ m^{-2}}

           A = 1.26 *10^{7} m^2

           

       

5 0
3 years ago
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