Atoy train of m=0.60 kg moves at 20m/s along a straight track. it bumps into another train of m=1.5kg moving in the same direction. they stick together and continue on the track at a speed 12 m/s. what was the speed in m/s of the second train just before the collision?

“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

135 peaches were sold.