A stone of mass 200 g attached to a string is made to revolve in a horizontal circle of radius 1.5 m at a steady speed of 5 m/s. Calculate the tension in the string at the bottom of the circle.

To convert a milli-ammeter to an ammeter, a resistor of low value is necessary to connect a resistor of 

An object is placed 1.5 m from a plane mirror. How far is the image from the object?

Chromatic aberration in lenses can be corrected by using a combination of 

A cube of water with side 10.0 cm floats vertically in water with 4.5 cm its length submerged. Calculate the density of the wood.
[Density of water = 1 g/cm\(^3\); D = 0.090 g/cm\(^3\)]