What variable affects the natural frequency of an organ pipe?

pipe length, width, area, or use.

The natural frequency of an organ pipe depends on the pipe length.

Explanation:

An organ pipe is an instrument which is used to produce sound. The organ pipe are of two types i.e. closed pipe and organ pipe.

Mathematically, the frequency of closed organ pipe is given as :

For open organ pipe :

Where,

n is the number of overtones

v is the speed of sound

l is the length of the pipe.

Hence, the correct option is (a) " pipe length ".

it is a negative acceleration

the answer is false. this is because for ice to melt, it requires latent heat of melting. latent heat means heat energy required to change phase without any increase in temperatures. therefore, the ice will take energy from the environment to melt hence atmospheric temperatures will reduce.