Choose the sources of gamma rays. check all that apply.

a. stars all warm objects
b. light bulb
c. some unstable atomic nuclei

Using the black numbers on the stopwatch to answer the questions. what is the most accurate reading of seconds as indicated by the long second hand? a. 5.3 b. 5.6 c. 7.2 d. 53 secs its for edg i found out it was 5.3 and tenth of seconds freebie