Answer:
Option D
+2
Explanation:
We know that Calcium has 20 electrons and 20 protons. It lost two electrons, it has 20 protons, but only 18 electrons. This makes calcium a positive ion with a charge of +2.
Potable water is also known as drinking water which is safe to drink and for cooking purposes
Answer:
a = 0
Explanation:
The velocity of a sound wave in a straight line is 660 mph. The wave is moving with a constant velocity. It means that the change in velocity is equal to 0.
We know that acceleration of an object is equal to the change in velocity divided by time taken. But here the change in velocity is 0. As a result the acceleration of the sound wave is 0.
Answer:
Exons
Explanation:
The sections of DNA (or RNA) that code for proteins are called exons
The answer you are looking for is True a neutron star is known for being calls a Red giant.