A box has two forces acting on it One force, is 100 Nupward. Another force is 50N
downward. What is the net force on the bar

100Nupward
50 Nupward
50 N douaward
100 N downward

Which function is performed by earths atmosphere? a. ultraviolet rays are prevented from reaching the ozone layer. b. earths temperature is raised and moderated by trapping in heat c. charged particles from the sun are prevented from reaching earth. d. magnetic charges from space are prevented from reaching earths surface.

Word equation for k(s) +h2o(l) yield koh (aq) + h2

Which of the following is not true about the atomic model of substances?