At the surface of the earth, there is an approximate average solar flux of 0.75 kw/m2. a family wishes to construct a solar energy conversion system to power their home. if the conversion system is 30% efficient and the family needs a maximum of 26 kw, what effective surface area is needed for perfectly absorbing collectors?

Explanation:

If the family needs 26 kW of power, and knowing that the efficient is 30% the relation between the solar flux and the power would be:

(1)

e is the efficient (in our case 0.3)

Φsolar is the solar flux

S is the effective surface

Solving (1) for S we have:

I hope it helps!

answer: 802.3 kilo joules of energy represents 191.75 kilo calorie of energy.

explanation:

energy released during combustion of one mole methane = 802.3 kilo joules

if 1 kilo joule = 0.239006   kilo calorie

then ,802.3 kilo joule will be = 802.30.239006 kilo calorie

802.3 kilo joule = 191.75 kilo calorie

hence, the energy in kilo calorie is 191.75 kilo calorie.

speed

ratio of distance traveled to time interval

net force

vector sum of forces on object

object

source of diverging light rays either luminous or illuminated

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explanation: