The resonance frequency of a closed air column is known to depend on pressure ,density of air ,and the length of the air column. How are these quantities related ​

The answers would be: 1: the liquid only contains one compound4: the liquid is a pure substance

“other instruments such as gravimeters and magnetometers are also used in the search for petroleum. extracting crude oil normally starts with drilling wells into an underground reservoir. when an oil well has been tapped, a geologist (known on the rig as the "mudlogger") will note its presence. “ this is what i found on google i hope it

Iwould say a is accurate