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EleoNora [17]
11 months ago
10

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 .
Part A got answer for part A and is correct
On average, how much energy does one house use during each 24 hr day?
Express your answer using two significant figures.
=86 MJ
Part B
If light energy to electric energy conversion using solar cells is 15%efficient, how many square miles of land must be covered with solar cells to supply the electrical energy for 250,000 houses? Assume there is no cloud cover. A=___________mi^2
Physics
1 answer:
Sphinxa [80]11 months ago
8 0

86.4×10^6 joule is energy does one house use during each 24 hr day.

20 MJ of light energy

Consumption of electricity is 1 kW.

The energy consumption lasts for 24 hours.

energy=power×time

energy=10^3×24×3600

energy=86.4×10^6 joule

Energy in physics is the ability to perform work. Different shapes, such as potential, kinetic, thermal, electrical, chemical, radioactive, etc., may be assumed by it. Other examples of energy being transferred from one body to another include heat and work. Energy is always distributed after it has been transported in accordance with its type. Thus, heat transfer could result in thermal energy, whereas work could result in mechanical energy.

Motion is a trait shared by all forms of energy. For instance, if a body is moving, it has kinetic energy. Due to the object's design, which incorporates potential energy, a tensioned object, like a spring or bow, has the ability to move even when at rest.

To know more about  energy visit : brainly.com/question/1932868

#SPJ4

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Answer:

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Explanation:

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It follows that F \propto v^2, provided m and r are constant.

When v is doubled, the new force, F_1, is

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Hence, the tension in the string is quadrupled.

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3 years ago
Arrange the stars based on their temperature. Begin with the coolest star, and end with the hottest star.
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A U-shaped tube open to the air at both ends contains some mercury. A quantity of water is carefully poured into the left arm of
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Answer:

a) P=2450\ Pa

b) \delta h=23.162\ cm

Explanation:

Given:

height of water in one arm of the u-tube, h_w=25\ cm=0.25\ m

a)

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P=\rho_w.g.h_w

we've the density of the water =1000\ kg.m^{-3}

P=1000\times 9.8\times 0.25

P=2450\ Pa

b)

Now the same pressure is balanced by the mercury column in the other arm of the tube:

\rho_w.g.h_w=\rho_m.g.h_m

1000\times 9.8\times 0.25=13600\times 9.8\times h_m

h_m=0.01838\ m=1.838\ cm

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\delta h=h_w-h_m

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No, it is not attracted.

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