The electric field between two - point charges is shown in the diagram above. What types of charges are at X and Y?
The electromagnetic wave that can produce a heating effect on the environment is
an electric cell with nominal voltage E has a resistance of 3Ω connected across it. If the voltage falls to 0.6E, the internal resistance of the cell is
\(^{23}_{11}\)Na + X → \(^{20}_9\)F + \(^4_2\)He
What particle is X in the reaction above?
