<h3><u>Answer;</u></h3>
It contains only water.
<h3><u>Explanation;</u></h3>
- The pH of a solution is a measure of the molar concentration of hydrogen ions in the solution and as such is a measure of the acidity or basicity of the solution.
- A pH of 7 is neutral. A solution with a pH of 7 is known as neutral solution, such a solution has equal concentration of H+ and OH- concentration. The OH- concentration balances the H+ concentrations in the solution making it neutral.
- Pure water is an example of a solution that is neutral, has a pH of 7.
The answer is c.
If we check our definitions in our notes, we can remember that it is the smallest part broken down in a word that provides meaning.
Answer: Some challenges that I could see would be the walls, possibly a moat, tar, and the towers.
Explanation: The wall is obliviously a main problem, trying to get over it or through it is a difficult challenge. The moat (if it has one) means that there is more than likely only one way to get in or out. If it does have tar it means that the attackers are going to be put in a "sticky situation" And finally the towers, they have people at the top shooting arrows down at you, or throwing things at you.
Answer:C
Explanation:
When a constant horizontal force is applied to the box, box started moving in the horizontal direction such that it moves with constant velocity 
Constant velocity implies that net force on the box is zero
i.e. there must be an opposing force which is equal to the applied force and friction force can serve that purpose.
So option c is the correct choice.
