What percentage of a radioactive species would be found as daughter material after five have lives? A. 50%
B. 25%
C. 15%
D. 12.5%
E. 3.125%​

Two friends are having a conversation. anna says a satellite in orbit is in freefall because the satellite keeps falling toward earth. tom says a satellite in orbit is not in freefall because the acceleration due to gravity is not 9.80 m/2 . who do you agree with and why?

Diamond will scratch quartz. true or false

J. j. thomson’s experiment disproved the theory that an atom