Answer:Radioactive
Explanation:
The radioactive nucleus is the one which does not has enough binding energy to hold the nucleus in a stable state and thus radiates either electron or proton to become a stable element.
A radioactive element is formed when after billions of years such as uranium and thorium. The stability of the nucleus depends upon the opposition of attractive and repulsive force among the nucleus.
The charge on each the balloon is 100nC or 1.2 × 10^-7 C
Consider two balloons of diameter 0.200m each with a mass of 1.00g hanging apart with 0.0500m separation on the ends of string making angles of 10.0° with the vertical.
The charge on each balloon can be found from
![F_{e} = \frac{k_{e}q^{2} }{r^{2}} \\q = \sqrt{\frac{k_{e}q^{2} }{r^{2}}} \\\\q = \sqrt{\frac{(2\times10^{-3N}(0.25m)^{2}}{8.99\times10^{9}N\cdotm^{2}/C^{2}}\\](https://tex.z-dn.net/?f=F_%7Be%7D%20%3D%20%5Cfrac%7Bk_%7Be%7Dq%5E%7B2%7D%20%7D%7Br%5E%7B2%7D%7D%20%5C%5Cq%20%3D%20%5Csqrt%7B%5Cfrac%7Bk_%7Be%7Dq%5E%7B2%7D%20%7D%7Br%5E%7B2%7D%7D%7D%20%5C%5C%5C%5Cq%20%3D%20%5Csqrt%7B%5Cfrac%7B%282%5Ctimes10%5E%7B-3N%7D%280.25m%29%5E%7B2%7D%7D%7B8.99%5Ctimes10%5E%7B9%7DN%5Ccdotm%5E%7B2%7D%2FC%5E%7B2%7D%7D%5C%5C)
or 100nC
An electric charge is the property of matter where it has more or fewer electrons than protons in its atoms. Electrons carry a negative charge and protons carry a positive charge. The matter is positively charged if it contains more protons than electrons and negatively charged if it contains more electrons than protons.
Learn more about the charge here:
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A certain amount of Conductivity
High frequency, as humans cannot hear the sound of the bats using echolocation because of it's such high frequency.
Hope this helps :)
Awnser is B. The forces are equal opposite of each other.