A tennis ball moves 16 meters northward then 22 meters southward then 12 meters northward and finally 32 meters southward What is the magnitude or displacement ?

Which type of bond is found between the atoms of a molecule? a. metallic b. delocalized electron c. covalent d. ionic

The force acting on a beam was measured under the same operating conditions and a sample of 5 data points was collected. this process was repeated by 3 observers. the pooled standard deviations of these 3 data sets was 1.21. determine the true mean force using all pooled data (with a 95% probability). the result should look like this: true mean = mean +/- margin of error

The necleus of an atom is made up of what subatomic particles?