Answer: 45
Explanation: thats what i have in my notes
From boyles law.
P1v1=P2v2
So,12.3×40=v×60
V= 12.3×40/60
8.2
Answer: copper is safer to use towards animals.
Aluminum has 61 percent of the conductivity of copper, but has only 30 percent of the weight of copper. That means that a bare wire of aluminum weighs half as much as a bare wire of copper that has the same electrical resistance. Aluminum is generally more inexpensive when compared to copper conductors.
<span>The energy needed to remove an electron from an atom is called ionization energy.</span>