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Ira Lisetskai [31]
3 years ago
15

Consider a household that uses 22.0 kW-hour of electricity per day on average. Most of that electricity is supplied by fossil fu

els. To reduce their carbon footprint, the household wants to install solar panels, which receive on average 376 W/m^2 from the Sun each day.
A) If the solar panels are 18.1% efficient (fraction of solar energy converted into useable electrical energy), what area of solar panels is needed to power the household?
Physics
1 answer:
Lelu [443]3 years ago
3 0

Answer:

A_{net} = 13.469\,m^{2}

Explanation:

The daily energy consumption of the household is:

\Delta E_{day} = (22\,kWh)\cdot (\frac{3600000\,J}{1\,kWh} )

\Delta E_{day} = 79200000\,J

The needed area of solar panel to power the household is:

\Delta E_{day} = \eta\cdot G\cdot A_{net}\cdot \Delta t

A_{net} = \frac{\Delta E_{day}}{\eta\cdot G\cdot \Delta t}

A_{net} = \frac{79200000\,J}{(0.181)\cdot (376\,\frac{W}{m^{2}} )\cdot (86400\,s)}

A_{net} = 13.469\,m^{2}

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scoray [572]

Answer:

a) -3.267 m/s

b) 2.227 m/s

Explanation:

As per the conservation of momentum

m1v1 + m2v2=0

m1= mass of log

m2 = mass of lumber jack

v1 = velocity of log

v2 = velocity of lumber jack

a) Velocity of first log

-\frac{70*7}{150} = -3.267 m/s

b) m1v1 + m2v2 = m3v3

Velocity of log

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4 0
3 years ago
Emerging adults are typically financially independent from their parents.<br> True or false?
zmey [24]

Answer:

False

Explanation:

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5 0
3 years ago
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What is the acceleration of a 50 kg object pushed with a net force of 500 newtons?
vodomira [7]
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3 years ago
Which of the following is not an example of work, according to the scientific definition
bogdanovich [222]

Leaning against a brick wall.

All the others use scientific forces of work.

-Steel jelly.

6 0
3 years ago
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how does spatial pattern of heights illustrate the relationship between temperature density and the rate of vertical pressure ch
Anika [276]

The rate of change of vertical pressure is directly proportional to density and also directly proportional to temperature.

Generally, the relationship between temperature, density and rate of vertical pressure is given as;

\rho = \frac{PM}{RT}

\frac{dP}{dz} = -\rho g\\\\

where;

  • <em>ρ is density</em>
  • <em>T is temperature</em>
  • <em>dP is rate of change of vertical  pressure</em>

Thus, from the formula above, we can conclude the following relationship between temperature, density and the rate of vertical pressure change in spatial pattern of heights.

The rate of change of vertical pressure is directly proportional to density and also directly proportional to temperature.

Learn  more here:brainly.com/question/25395377

5 0
3 years ago
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