5.5.2 test (cst): computer-scored unit test
question 3 of 25
2 points
a sample contains 100 g of a radioactive isotope. how much radioactive
isotope will remain in the sample after 3 half-lives?
0
0
o a. 50g
o b. 259
c. 12.59
od. 1009
0

Review multiple-concept example 7 in this chapter as an aid in solving this problem. in a fast-pitch softball game the pitcher is impressive to watch, as she delivers a pitch by rapidly whirling her arm around so that the ball in her hand moves in a circle. in one instance, the radius of the circle is 0.626 m. at one point on this circle, the ball has an angular acceleration of 66.1 rad/s2 and an angular speed of 12.6 rad/s. (a) find the magnitude of the total acceleration (centripetal plus tangential) of the ball. (b) determine the angle of the total acceleration relative to the radial direction.