Which electrical device is illustrated above?
A simple barometer is constructed using a liquid \(Q_{1}\) of density 16.2\(g/cm^{3}\). Calculate the least lenth of the tube to be used to measure pressure of 1.5atm. [Density of mercury = 13.6\(g/cm^{3}\), 1atm = 76.0 cm of Mercury]
A bar AB is balanced horizontally on two knife edges as illustrated as in the diagram above. Determine the weight of the bar.
To obtain a virtual, erect and magnified image from a thin converging lens, an object must be placed
The diagram above represents a transverse travelling wave. Which two points are 180° out of phase?
