Avector of magnitude 20 is added to a vector of magnitude 25. the magnitude of this sum. might be: . a. zero. b. 3. c. 12. d. 47. e. 50

Asap and show ! a 14 kg rock starting from rest free falls through a distance of 5.0 m with no air resistance. find the momentum change of the rock caused by its fall and the resulting change in the magnitude of earths velocity. earth mass is 6.0 * 10^24 kg. show your work assuming the rock earth system is closed.

What happens to an isotope during radioactive decay?

Which of these metals are magnetic?