The heart of a man pumps 5 litres of blood through the arteries per minute at a pressure of 150 mm of mercury. If the density of mercury be then the power of heart in watt is:

When an empty bottle is closed air tight and pushed inside water it bounces back when it is released. This is because _______.

A barometer is constructed using a liquid (density =760kg/m³). What would be the height of the liquid column, when a mercury barometer reads 76cm ?
(Density of mercury =13600kg/m³)

A liquid does not wet the solid surface if angle of contact is