When the charged balloon is brought near the wall, it repels some of the negatively charged electrons in that part of the wall. Therefore, that part of the wall is left repelled.
<u>Explanation</u>:
- Balloons don't stick to walls. However, if you rub the balloon on an appropriate piece of material such as clothing or a wall, electrons are pulled from the other material to the balloon.
- The balloon now as more electrons than normal and therefore has an overall negative charge. Two balloons like this will repel each other.
- The other material now has an overall positive charge. Because opposite charges attract, the balloon will now appear to stick to the other material. If you didn't rub the balloon first, it's charge would be neutral and it wouldn't stick to the wall.
Answer:
Burning of paper is not a physical change.It is chemical change as ash is formed in the process which is new compound and oxides of carbon are also released during the process!
Answer:
B) Ethanol must act as a competitive inhibitor for the alcohol dehydrogenase and therefore slows the formation of formaldehyde.
Explanation:
An<em> inhibitor</em> is a substance that binds to an enzime and prevents it to react with a substrate. In this case, the inhibitor is ethanol, binding to the enzime (alcohol dehydrogenase) <u>and preventing it to react with methanol and thus from it form the toxic formaldehyde</u>.
A competitive inhibitor has a similar structure to the substrate, that is why it binds to the same active site. In this case, ethanol has a similar structure to methanol, which is why the answer is B and not A.
A soft drink with no fizz would be the answer because in a solution there's a solute, which makes it a little bit of a solution; it is usually dissolved. (Which is the sugar/sodium in a soft drink. Then, the solvent makes up most of the solution, which is water in this case.
