Answer:
Concrete absorbs visible light and re-radiates it as infrared energy.
Explanation:
As we know that concrete will not reflect 100% light incident on it but it will absorb few energy and remaining energy is reflected back.
So here when visible light incident on the concrete then few of its energy is absorbed by is and then the remaining energy is reflected back.
Since the reflected energy must be less than the energy which incident on the concrete so here we will say that the reflected waves must be of less frequency range
so here most appropriate energy range of reflected wave is infrared waves
so here correct answer will be
Concrete absorbs visible light and re-radiates it as infrared energy.
<h3><u>Answer;</u></h3>
the north end to the south end.
<h3><u>Explanation;</u></h3>
- Magnetic field lines from a bar magnet form lines that are closed. The direction of magnetic field is taken to be outward from the North pole of the magnet and in to the South pole of the magnet.
- A magnetic field refers to the area surrounding a magnet where a force is exerted on certain objects. These lines are spread out of the north end of the magnet.
- The magnetic field lines resemble a bubble.
Answer:
The soup still is cool, or since its recent it will take a while to get warmer
Explanation:
Answer: B) Uranium
Fossil fuels are natural fuels that were formed from the buried remains of living organisms that lived millions of years ago. Uranium is not a fossil fuel, but it is considered as a nonrenewable fuel.
Answer:
Value of angle between vector a and b is 
.
Explanation:
Vectors a and b have scalar product 6.00
Let 
be the angle between a and b.
ab cos = 6 ...(1)
Vectors a and b have magnitude of vector product 9.00
ab sin = 9 ...(2)
Dividing equation (2) by (1) we get
tan = 1.5
=
Thus, value of angle between vector a and b is .
