a lorry contains an engine with a power of 42,000w. how long will it take for the lorry to transfer 850j of energy

“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

B) raising the temperature and reducing the volume of the gas.|-/ 

I’m good with pshycology