Q. A cylindrical container 1.30 tall contains mercury to a certain depth,. The rest of the cylinder is filled with water. If the pressure at the bottom of the cylinder is two atmospheres, what is the depth?
Q. A street lamp weighs 146 N. It is supported equally by two wires that form an angle of 120° with each other.
(i) What is the tension of each of these wires?
(ii) If the angle between the wires is reduced to 90°, what new force does each wire exert?
(iii) As the angle between the wires decreases, what happens to the force on wires?