Answer:
Convent bonding of cross linking constrain polymer chains from relative movements. the degree of cross linking will correlate with the stiffness of the polymer. highly cross-linked polymers will also have a high resistance to creep as the chains cannot move into new positions.
Explanation:
Answer:
Option D, Zinc is higher on the activity series because there is clear evidence of a reaction.
Explanation:
It is very clear that a metal which is higher in activity will replace a metal having lower activity.
Since, Zinc has higher activity than copper, it is very sure that it in a copper chloride solution it will replace copper and produce zinc chloride solution leaving behind copper as residue.
Residues of copper is a clear evidence of reaction
The chemical equation for this reaction would be -
Hence, option D is correct
It might knock the old theory away completely because all of the new knowledge doesn't support the theory or it could change it because some of the new information supports the old stuff.
Answer:
Firstly matter is definite as anything that has a mass and occupies space. Does air has those qualities? Yes. air contains of molecules and makes up the mass component and have you ever try compressing air? From that you knowa it occurs space
So what must be true is that it must have mass and occupy space
Answer:
A= Salamanders and frogs
lizards and snakes
crocodiles and birds
B= lungfish
Explanation:
for A, I used the chart to see which animals were on the same branch
for B, I used the chart to see which animals were closest to the same branch
I had some difficulty with C