<span>Different materials expand and contract at different rates based on temperature. Just like if you leave a plastic bottle full of water in a freezer it will burst, but if you leave it partially full no problem.....Ok?Expansion joints do the same for bridges. There is a gap to allow for temperature related expansions and contractions. Sometimes you drive over bridges and roadways where this movement is constricted and you might notice a bumpy ride. Engineers can predict the variation of structural length based on span lengths and leave the necessary gaps.....btw, NICE QUESTION:)</span>
From Boyle's law, the volume of a fixed mass of a gas is inversely proportional to its pressure at constant absolute temperature.
Therefore; P1V1 =P2V2; where PV is a constant
hence; 12 × 6 = 3× p2
p2 = 72/3
= 24 atm
Therefore; the new pressure will be 24 atm
The correct matches are as follows:
<span>1. first nuclear reactor
</span>Fermi - an italian physicist who made the first nuclear reactor<span>
2. </span>1/0 η<span>
</span>atomic mass <span>
3. decaying nuclei
</span>fission<span> - nuclear reaction from a heavy elements to lighter elements
4. number of neutrons and protons
</span>neutron <span>
5. builds heavier elements
</span>fusion - nuclear reaction from two or more elements to a heavier element<span>
6. discovered radioactivity
</span>Curie<span>
7. unit of radiation
</span> Becquerel
The answer would probably be B.
