A book with a mass of 1.8 kg sits on a bookshelf. If it has a gravitational potential energy of 42 J, how high is the shelf? The acceleration of gravity is
9.8 m/s2

“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

490 n  f=125n a=2.5m/s2

Ithink the answer is c. make unnecessarily  wide gestures