Answer is A I hope it helps
Okay, passive solar is used to gain heat energy, not electricity, so that is one. All the others can be used to produce electricity, so I'm not sure what the second answer is.
The geologic time scale originally ordered Earth’s rocks by relative age.
<u>Explanation:</u>
Geologic time scale is the measure of events occurred in year wise from the starting of universe. Mostly dating of rocks and fossil fuels are doing the trends still now. In order to measure the age of rocks, geological time scale have preferred relative age mode.
In this system, the age of rocks are measured and compared layer by layer. So the lowest layer of rock will be having the maximum age. As we don’t know the starting time of universe, so this method of comparison between the layers to order the rocks is best. So, depending upon the position of the rocks, the age can be determined.
Answer:
Take shorter showers.
Throw newspapers in the trash can.
Answer:
The Electric flux will be 
Explanation:
Given
Strength of the Electric Field at a distance of 0.158 m from the point charge is
We know that the flux of the Electric Field can be calculated by using Gauss Law which is given by
Let consider a sphere of radius 0.158 m as Gaussian Surface at a distance of 0.158 m from the point charge and Let 
be the flux of the Electric Field coming out\passing through it which is given by
It can be observed that same amount of flux which is passing through the Gaussian sphere of radius 0.158 is also passing through the Gaussian sphere of radius 0.142 m at a distance of 0.142 m from its centre.
Also it can be observed that the charge inside the two Gaussian Sphere mentioned have same value so the Flux of electric field through them will also be same.
So the electric flux through the surface of sphere that has given charge at its centre and that has radius 0.142 m is
