: I need a smart guy to talk to because im bored and the boys are interesting

In a heat of an engine, if 700 j enters the system, and the piston does 400 j of work what is the final internal (thermal) energy of the system if the initial energy is 1,500 j

The plant food contains nh4)3po4 what tests would you run to verify the presence of the nh4 ion and the po4 ion

Which words or phrases identify layers of groundwater? check all that apply. water table kettle lake saturation zone underground lake sinkhole will give brainiest, answer quickly.