Answer:
copper
Explanation:
The most common material used in electrical circuit and for making electrical wire is copper. The properties of copper is listed below:
- Copper has a very good electrical and thermal conductivity.
- Copper is relatively cheap when compared to other metals.
- Copper is soft and malleable, that is it can be beaten into sheets without breaking or cracking
- Copper is ductile, that is it can be drawn into thin wires,
I believe it’s the first, third and fourth ones. I might be wrong and I’m sorry if I am.
Answer: <u>Option B; 100</u>
Explanation: If the cell is placed in a solution with 75 ppm calcium ions, then the cell will die, because water will enter the cells and they can burst. 75 ppm is quite a hypotonic solution for survival of bacterial cells. Same is the case will 125 ppm, here the cells will die because of dehydration. The increased solute concentration will make the bacterial cells to loose water and this principle is used in preservation.
100 ppm will provide the most stable environment because the water movement will occur at a same rate and the processes of the cell can proceed at required rate.
<span>Are pollution can cause acid rain and the acid rain can hurt lots of living things. </span>