The correct answer
would be d
Iron and carbon
hope this helps
To get rockets into orbit, they need much more thrust than the amount that will get them up to the required altitude. They also need sufficient thrust to allow them to travel with very high orbital speed. ... If speed is less than this, an object will fall back to the Earth
Answer:
Head loss=0.00366 ft
Explanation:
Given :Water flow rate Q=0.15 
= 6 inch=0.5 ft
=2 inch=0.1667 ft
As we know that Q=AV

So 

=0.687 ft/sec
We know that Head loss due to sudden contraction

If nothing is given then take K=0.5
So head loss
=0.00366 ft
So head loss=0.00366 ft