1. A 1500kg car is being lifted by a hydraulic jack attached to a flat plate. Underneath the plate is

a pipe with radius 24cm.

a) If there is no net force on the car, calculate the pressure in the pipe.

How many atoms of mg are present in 97.22 grams of mg? 6.022 × 1023 2.408 × 1024 4.818 × 1024 5.855 × 1025

Which of the following observations indicates that there is a small, dense, positively charged part in the center of an atom? some uncharged particles are scattered by a gold foil. all uncharged particles are attracted towards a gold foil. all positively charged particles pass straight through a gold foil. some positively charged particles bounce back from a gold foil.

Which characteristics can be used to differentiate star systems? check all that apply.