Recent content by dragoljub

  1. D

    High School Confused with the Archimedes' Principle

    mg-gravitational force ρfVg -Buoyancy = weight of displaced fluid Fnet=mg-ρfVg if mg>ρfVg (or ρo>ρf) -object falls if mg<ρfVg (or ρo<ρf) -object floats
  2. D

    High School How to Easily Factor a Quadratic Expression?

    2x^2+9x-5=2x^2+10x-x-5 =2x(x+5)-(x+5) =(x+5)(2x-1)