Dscjl, cmcdmdcnc, m.vf. dcmv;lmsdc,.cd

Which is the best predictor of the radioactive nature of an isotope? o the proton-to-electron ratio the neutron-to-proton ratio o the neutron-to-electron ratio the electron-to-proton ratio

How can you increase the strength of an electromagnet?

For the car in the picture ,in which direction is the normal force? -into the screen -down -out of the screen -up