What happens to the fundamental frequency of a stretched string when its linear density becomes 1/4 of its intial value?

What will happen to the area of a square if its side is halved

The fundamental frequency of a string stretched with a weight of 4kg is 256 Hz. The weight required to produce its octave is

An object of density 2000kg- m^(-3) is hung from a thin light wire . The fundamental frequency of the transverse waves in the wire is 2009 Hz. If the object if immersed in water such that half of its volume is submerged, the the fundamental frequency of the transverse waves in the wire is

What will happen to the area of a square if its side is doubled

A stretched wire of some length under a tension is vibrating with its fundamental frequency. Its length is decreased by 45% and tension is increased by 21%. Now its fundamental frequency

A metallic wire with tension T and at temperature 30 ^0 C vibrates with its fundamental frequency of 1 kHz. The same wire with the same tension but at 10 ^0 C temperature vibrates with a fundamental frequency of 1.001 kHz. The coefficient of linear expansion of the wire is