The molecular weight of air is 29. The value of R for air in N.m/kg. K is
A.241048
B.8312
C.286.6
D.63.3
A.241048
B.8312
C.286.6
D.63.3
A.10 mm
B.5 mm
C.3 mm
D.1 mm
A.frictional and surface tension forces
B.gravity and surface tension forces
C.gravity and pressure forces
D.frictional and pressure forces
A.very low pressures only
B.low pressures accurately
C.large pressures only
D.all pressures except the small ones
A.less than the external pressure
B.greater than the external pressure
C.equal to the external pressure
D.equal to the vapour pressure at the prevailing temperature.
A.(2h-x) (h-x) = h2
B.h(h-x) = h2
C.(2h-x) (h+x) = h2
D.2h(h-x) = h2
A.adhesion being greater than cohesion
B.cohesion being greater than adhesion
C.adhesion being equal to cohesion
D.vapor pressure being small.
A.9.806
B.9.316
C.10.322
D.0.95
A.1-Jan
B.(30.48)2
C.(30.48)-2
D.144