I would believe that this is false.
Answer:
The average speed of the elevator going down in the abandoned mine is 17.722mph.
Explanation:
If the elevator takes 90 seconds to descend a height of 713m, the average speed of the elevator is:

And if 1m/s is 2.23694mph, the average speed is:
.
Answer: Option (d) is the correct answer.
Explanation:
A chemical reaction in which heat energy is liberated is known as an exothermic reaction.
For example, 
In an exothermic reaction, energy of reactants is more than the energy of products.
This means that potential energy of products is less than the potential energy of reactants.
Thus, we can conclude that in the reaction
, the potential energy of the products is less than that of the reactant.
To determine the amplitude of a wave, you would need to know the : B. Maximum displacement of the wave from the equilibrium position
You can find out the displacement by counting the waves that is
written on the Graph
Hope this helps
Please find the attached photo for your answer. Hope it helps..