Add each of the following vectors and find the total resultant.
a. 15 m east and 25 m north.
b. 220 m north and 80 m west.
c. 2.2 m south and 1.8 m north.
d. 150 m east and 180 m south.
e. 45 m south, 30 m east, and 15 m north.

Radioisotopes often emit alpha particles, beta particles, or gamma rays. the distance they travel through matter increases in order from alpha to gamma. each radioisotope has a characteristic half-life, which is the time needed for half of a sample of radioisotope to undergo nuclear decay. which quality is desirable for a radioisotope that is used for medical imaging of a specific organ? check all that apply. half-life of several years half-life of several days half-life of several seconds emission of gamma rays emission of alpha particles ability to be attached to a compound used by the body ability to pass through the body without being absorbed