Answer:
<em>The</em><em> </em><em>spread</em><em> </em><em>of</em><em> </em><em>european</em><em> </em><em>disease</em><em> </em><em>to</em><em> </em><em>america</em>
Pump curves give the data about the ability of the pumps to produce the flow against a particular head.
<u>Explanation:</u>
Pump curves are basically information about a given siphon's capacity to deliver stream against certain head. At the point when you're perusing a bend, the siphon's stream rate will be on the top and base and its stature to push is on the sides.
In the system that the framework will have a filter which requires cleaning when the stream rate drops, the steep curve permits more weight drop at a given stream rate as we drop from the structure point.
You should say hello and ask them what they need ,not just leave them alone
