The acceleration is zero when the slope of a velocity Vs time graph is zero. Therefore at 2sec the slope is zero and acceleration is zero.
So the answer is D. T=2sec
If this did not exist, a table you push would keep going forever. Your energy is expressed back to you.
D only kinetic energt because if it had heluim or any thing jt will float up
Answer: Covalent Bonds or Covalent Bonding Electrons
Explanation:
A covalent bond, also called a molecular bond, is a chemical bond that involves the sharing of electron pairs between atoms. These electron pairs are known as shared pairs or bonding pairs, and the stable balance of attractive and repulsive forces between atoms, when they share electrons, is known as covalent bonding.
An Earth revolution is a trip around the sun in a closed path (relative to the sun).
The path is very nearly an ellipse with the sun at one focus, and a little less nearly a circle with the sun at the center.
One complete revolution takes roughly 365.24 days, and at that point, the Earth immediately begins another one.
We have a special word that we use to refer to that special period of time. In English, it's called a "year".