This is important i need to turn this in tomorrow, how many half-lives does it take to get from 1,000 to 125, and in what region of virginia would you find young and old rivers. you in advance!

What type of nuclear decay causes the atomic number of an element to increase by 1?

What is the electric force acting between two charges of -0.0045 c and -0.0025 c that are 0.0060 m apart? use fe=kq1q2/r^2 and k = 9.00 x 10^9 n*m^2/c^2 a. 1.7 x 10^7 n b. -1.7 x 10^7 n c. -2.8 x 10^9 n d. 2.8 x 10^9 n

The earth exerts a gravitational force of 500 n on amy. what is amy’s mass in kg?