A teacher measured the count-rate from a sample of lanthanum-140 using a Geiger-Muller (G-M) tube.

Explain why the count rate was less than the activity of the sample of lanthanum-140​

How do you identify the anode on a power source such as a battery? how do you identify the cathode? how are terms anion and cation?

An object becomes electrically charged when: electrons are created in it electrons from it are destroyed electrons are transferred to it protons from it are destroyed protons are created in it

Name the intersection of plane bpq and plane cpq.