A piece of magnesium ribbon is massed and placed into a sealed flask containing dilute HCl as shown above. Once the reaction is complete, the tube is adjusted to that the water in the tube
is level with the water in the trough and the volume of gas is recorded as 25.50 ml. The
atmospheric pressure in the room is recorded as 765.5 mmHg at a temperature of 23°C. The
vapor pressure of water at 23°C is 21.1 mmHg

mechanics (greek   is that area of science concerned with the behaviour of physical bodies when subjected to forces or displacements, and the subsequent effects of the bodies on their environment. the scientific discipline has its origins in ancient greece with the writings of aristotle and archimedes[1][2][3] (see history of classical mechanics and timeline of classical mechanics). during the early modern period, scientists such as galileo, kepler, and newton laid the foundation for what is now known as classical mechanics. it is a branch of classical physics that deals with particles that are either at rest or are moving with velocities significantly less than the speed of light. it can also be defined as a branch of science which deals with the motion of and forces on objects. the field is yet less widely understood in terms of quantum theory.

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