A water jet with a cross-sectional area of 0.01 m2 impinges normally on a flat plate and flows away tangentially along the plate. If a force of 490 N is exerted on the plate due to this impact and the density of water is taken as 1000 kg/m3, the velocity of the jet is:

A U-tube differential manometer is connected between two pipes A and B. The pressure at pipe A is PA = 10 kPa. Determine the gauge pressure (in Pa) in pipe B (PB). Take the specific weight of water γw = 9810 N/m3 and the specific gravity of mercury SHg = 13.6.

An object weighs 289.2 N in air and 186.9 N when completely immersed in water. What is the relative density of the material of the object?