A light-year is the distance that light travels through space in 10 years.

A-True

B-False

“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

A. they hold atoms  together with a molecule.its a force that exist between molecules. hope this .