An electron moving with a velocity = 5.0 × 107 m/s enters a region of space where perpendicular electric and a magnetic fields are present. the electric field is = . what magnetic field will allow the electron to go through the region without being deflected?

(a) calculate the number of electrons in a small, electrically neutral silver pin that has a mass of 10.0 g. silver has 47 electrons per atom, and its molar mass is 107.87 g/mol. (b) imagine adding electrons to the pin until the negative charge has the very large value 1.00 mc. how many electrons are added for every 109 electrons already present

What was the first instrument to ever record an earthquake?

Sort the images based on whether there's a force of attraction or repulsion between the magnets shown. attraction repulsion