Physics Past Questions and Answers

The diagram above represents the stress-strain graph for a typical metal rod. What does the X represent?

In the diagram above, the pressure of the gas is

A mirror of weight 75N is hung by a cord from a hook on the wall. If the cord makes an angle of 30^o with horizontal, the tension in the cord is

In a gas experiment, if the volume of the gas is plotted against the reciprocal of the pressure, the unit of the slope of the resulting curve is

A shooter wants to fire a bullet in such a way that its horizontal range is equal to three times its maximum height. At the what angle should he fire the bullet to achieve this?