objects that are more dense, or have more mass, fall at a faster rate than less dense objects, due to this air resistance. A feather and brick dropped together. Air resistance causes the feather to fall more slowly.
your lenght is the answer to your question
Answer:
Explanation:
Given
Wavelength of first timpani 
Frequency corresponding to this Wavelength

where 


Wavelength of Second timpani 
Frequency corresponding to this Wavelength


Beat frequency 
Beat frequency 
so approximately 7 beats per second
A transverse wave (electromagnetic wave) carries energy through space.
The answer is B, 1/4 of the cake