True or False? Sometimes, substances can be added to a reaction to cause the reaction to start or speed up. These are not considered reactants or products. They are called CATALYSTS.
A) True
B) False

A catalyst is a chemical substance that affects the rate of a chemical reaction by altering the activation energy required for the reaction to proceed. This process is called catalysis. A catalyst is not consumed by the reaction and it may participate in multiple reactions at a time.

Explanation:

a

diagram is missing, but i will try to explain your doubt.

answer:

amplitude is the maximum displacement or distance moved on a point of a vibrating body or wave measured from its equilibrium position.it is equal to half the length of vibration path.

f is prop to m1xm2 double m1 double force