Physics Past Questions and Answers

Dewpoint is the temperature at which, water vapour in the atmosphere

The lower and upper fixed points marked on a mecury-in-glass thermometer are 210mm apart. The end of the mercury column in the tube is 49mm above the lower fixed point in a room. What is the temperature of the room in degrees Celsius?

If a solid changes directly into a gas when heat is applied the process is called

A plane inclined at an angle of 30<sup style='font-size: smaller;'>o</sup> to the horizontal has an efficiency of 60%. The force parallel to the plane required to push a load of 120N uniformly up the plane is

A body of mass 5kg initially at rest is acted upon by two mutually perpendicular forces 12N and 5N as shown in fig.3. If the particle moves in the direction QA, calculate the magnitude of the acceleration