Flexible connections are used because bridges sway. If there were steel or non flexible connections, the road would crumble. Another reason is steel would expand or contract in the heat or cold. If the steel expanded or contracted, then the road would be weak. And since the people on the road don't want it to crumble, the architect put flexible connections instead of hard ones.
Answer:
Cornea >iris>lens >retina
Explanation:
Can't exactly figure out the answer but I think it should look like this
Answer:
C) is less than 7
Explanation:
The dissociation constant, Ka of nitrous acid, HNO2 = 4.5 * 10^-4
Ammonia, NH3, is a weak base with a Kb value of 1.8x10^-5
When a weak acid like HNO2 reacts with an equivalent amount of a weak base NH3, complete neutralization does not occur. The concentrations of the species in equilibrium with each other will depend on the equilibrium constant, K, for the reaction,
Since the dissociation constant, ka of nitrous acid is higher, at equivalence point the pH of the solution will be slightly acidic with a pH that is less than 7.