Answer:
14.5m/s
Explanation:you had to divide 2.5s divide that by 1.8
You might want to visit this website
https://www.nedcc.org/free-resources/preservation-leaflets/4.-storage-and-handling/4.1-storage-metho...
The outer surface of the glass expands faster than the inside surface since glass is a fairly good thermal insulator. The outer surface tries to expand without the inner surface doing so at the same time. This is the secret of Pyrex glass. It is more conductive to heat and the inner and outer surface expand (and contract) at the same time.
Answer:Explained
Explanation:
The scientist of that time could not believe that the electromagnetic waves do not require a medium to travel through so they made a space filling substance necessary to travel of electromagnetic waves called aether.
But after the special 0 theory of relativity this idea is discarded and fell out.
Explanation :
Given equation

This equation is balanced. because the number of reactants is equal to the number of products.
According to conservation of matter and energy,
The conservation of matter and energy states that matter can not create and can not destroy but conserved. we can only change one form to another form of the matter and energy.
So, we can say energy conserved and the ,mass of the system always same over time.