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 ?

What is the electric force acting between two charges of -0.0045 c and -0.0025 c that are 0.0060 m apart? use fe=kq1q2/r^2 and k = 9.00 x 10^9 n*m^2/c^2 a. 1.7 x 10^7 n b. -1.7 x 10^7 n c. -2.8 x 10^9 n d. 2.8 x 10^9 n

What is the increase in density of a medium due to wave travel?

What happens when you slowly pulled the carboard?