To construct a barometer, tube of length 1 m is filled completely with mercury and is inverted in a mercury cup. Thebarometer reading on a particular day is 76 cm. Suppose a 1 m tube is filled with mercury up to 76 cm and then closed by a cork. It is invertd in a mercury cup and the cork is removed. The height of mercury column in the tube over the surface in the cup will be

To construct a barometer, tube of length 1 m is filled completely with

1.	To construct a barometer, tube of length 1 m is filled completely with mercury and is inverted in a mercury cup. Thebarometer reading on a particular day is 76 cm. Suppose a 1 m tube is filled with mercury up to 76 cm and then closed by a cork. It is invertd in a mercury cup and the cork is removed. The height of mercury column in the tube over the surface in the cup will be
Answer» zero 76 cm gt76 cm lt76 cm Answer :D