Answer:
A substance that speeds up a chemical reaction—without being a reactant—is called a catalyst. The catalysts for biochemical reactions that happen in living organisms are called enzymes. Enzymes are usually proteins, though some ribonucleic acid (RNA) molecules act as enzymes too.
Explanation:
enzymes don't change their own reaction. That's because they don't affect the free energy of reactants or the products.
Chips or cracks can make the glassware more likely to break, especially if the experiment putting substances over heat.
Also, I suppose you could cut yourself on the damaged glassware.
Answer: The least number of times the multiplicative identity in a ring needs to be added to itself to reach the additive identity, or, if the additive identity is never reached, zero. The integers have a characteristic of zero; the integers modulo 12 have a characteristic of 12.
Explanation:
Water.
as in water cycle..
evaporate and condense
hope it hel;ped
Which simple machine can be described as a rope that is threaded through a wheel or disk?
The correct answer is B - Pulley
A pulley is a simple machine that is used to lift loads. It consists of a wheel on which a rope is placed and the rope is pulled by the person towards himself to lift the load that is tied on the other side of the rope. There are three main types of pulleys: fixed, movable, and compound.