The lock is made from titanium metal, which has a melting point of 1668°C. The lock is under 1.00 atmosphere of pressure and the room is at 25 °C. If you raise the pressure of the mechanism enough to melt the metal, the lock will release. To do this, you must increase the pressure to mmHg (round your answer to the nearest whole number)

a  solution  is always transparent, light passes through with no scattering from solute particles which are molecule in size. the  solution  is homogeneous and does not settle out. a colloid is intermediate between asolution  and a  suspension. while asuspension  will separate out a colloid will not.

it's c (engineer's do their work with mechanical stuff not on any living being)