posting below is contain Physics Prediction and practice for SMP (Junior High School) 2008,contain 4 page with 20 number of problems, at the last page you 'll also can find the right answer. the problems are about :atom, electron, proton and neutron principalequilibrium of mass basic force and work conceptBasic gas and ideal gas equation (PV=nRT)Molecule of sulfat acid (asam sulfat)Velocityand
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