Thermal expansion<span> is the tendency of matter to change in shape, area, and volume in response to a change in temperature, through </span>heat<span> transfer. Temperature is a monotonic function of the average molecular kinetic energy of a substance. When a substance is heated, the kinetic energy of its molecules increases.so this can result in.......heat</span>
People will buy more of a good when its price falls and less when its price rises, according to the law of demand.
Answer:
2.31J
Explanation:
the energy for a spring system is given by:

where
is the spring constant:
and
is the distance stretched from the equilibrium position.
In the first case 
so the energy to stretch the spring 1.81cm is:

and for the second case, the energy to stretch the spring 5.79cm:


so to answer a) we must find the difference between these energies:

Well I can help you with some...
1. The answer is 2 Hydrogen and 2 Oxygen
3. 4 Hydrogen and 2 Oxygen
4. 16 Hydrogen and 16 Oxygen
6. 2 H2O
7. 4 H2O is 4 Water Molecules while H8O4 is 1 molecule of H2O Trihydrate