<span>harnessing the sun's energy to produce heat or electricity is : Non-polluting
Unlike oil or gas based energy, solar energy create no dangerous emission that is dangerous for our environment.
Many scientist believed that solar energy is the answer to the environmental crisis that we currently faced.</span>
Answer:A language is a structured system of communication. Language, in a broader sense, is the method of communication that involves the use of – particularly human – languages. The scientific study of language is called linguistics
Explanation:
Answer:
B.
Scientific laws have been proven without exception under certain stated conditions.
Explanation:
Uranium-238 undergoes alpha decay. Therefore, uranium-238 will
A. Remain stable
B. Stay the same element
C. Release charged particles and no energy
<u>D. None of the above</u>
The actual answer is that it will change into a different element altogether.
Answer: It would take 10.16 million years.
Explanation:
Light travels at a speed .
A light-year is the distance that light travels in vacuum in one year.
The Andromeda Galaxy is 2.54 million light-years from the Earth.
This means that
Let's say is the speed of the ship. Then
⇒
So, we have:
⇒
⇒
So, at speed , it would need a time of 10.16 million years.