What must be the height of water column that the atmospheric pressure can support in water barometer? [Density of water = 1000 kg/m', g = 9.8 m/s2, 1 atm = 1.01 10% N/m²].​

Ahockey player of mass 82 kg is traveling north with a velocity of 4.1 meters per second he collides with the 76 kg player traveling east at 3.4 meters per second if the two players locked together momentarily in what direction will they be going immediately after the collision how fast will they be moving