Tops stops spinning because it doesn't have energy or ran out of force for example when you spin a top you give force to it then after 30 sec it going to stop going slower and slower that Is losing energy that's how tops stops spinning
Mmm, you can work this one out in your head by reversing it.
<span>12.5 = 50g/4 </span>
<span>1/4 = 1/2 * 1/2 </span>
<span>thus in 14.4 seconds there have been 2 times the half life. 14.4/2 = 7.2 </span>
<span>the half life is 7.2 seconds.</span>
Answer:
the only one i really know is magna carta which is an article created so that the king's power could be limited or something
Answer:
Acid base titration curves shows the pH at equivalence point
Explanation:
Since the images were not shown, I will proceed to give a general description of the following acid-base titration curves:
In a strong acid-strong base titration, the acid and base will react to form a neutral solution. At the equivalence point of the reaction, hydronium (H+) and hydroxide (OH-) ions will react to form water, leading to a pH of 7.
The titration curve reflects the strengths of the corresponding acid and base. If one reagent is a weak acid or base and the other is a strong acid or base, the titration curve is irregular, and the pH shifts less with small additions of titrant near the equivalence point.
Polyprotic acids are able to donate more than one proton per acid molecule, in contrast to monoprotic acids that only donate one proton per molecule. In the titration curve of a polyptotic acid and a strong base, The curve starts at a higher pH than a titration curve of a strong base. There is always a steep climb in pH before the first midpoint. Gradually, the pH increases until it passes the midpoint; Right before the equivalence point there is a very sharp increase in pH.
Answer:
A. NaOH.
Explanation:
The pH of the solution = 6.8.
- The pH of the solution increases as the basicity of the solution increases.
- The basicity of the solution will increase by adding bases that have the ability to produce OH⁻.
So, NaOH and NH₃ "bases" will increase the pH of the solution.
while, HCl and HNO₃ "acids" will increase the acidity of the solution, thus pH will decrease.
But, NaOH will increase the pH of the solution the most because it is dissociates completely to OH⁻ , while NH₃ is weakly ionized "does not dissociate completely".
<em>So, NaOH will increase the pH the most when added to the solution.</em>
