A Closed U-tube manometer has a gas at one end and vacuum at other end, if the height difference of the liquid (density = 10 kg/m3) in the manometer in 5 cm, what is the pressure of the gas?

A Closed U-tube manometer has a gas at one end and vacuum at other end

1.	A Closed U-tube manometer has a gas at one end and vacuum at other end, if the height difference of the liquid (density = 10 kg/m3) in the manometer in 5 cm, what is the pressure of the gas?
A.	t10 N/m<sup>2</sup>
B.	t5 N/m<sup>2</sup>
C.	t2.5 N/m<sup>2</sup>
D.	t1 N/m<sup>2</sup>
Answer» C. t2.5 N/m<sup>2</sup>