Electrons are fired at a rectangular potential energy barrier, once every 221 ms. If the barrier is 2.55 mm thick and has a height that exceeds the energy of the incident electrons by exactly 637 meV, how long on average would you expect to wait for one electron to pass through the barrier

In order for the bug to fly through the air a force has to push the bug forward. identify this force. how does the bug produce

Two point charges are separated by a certain distance. how does the strength of the electric field produced by the first charge, at the position of the second charge, change if the second charge is doubled? a. the field does not change b. the field strength decreases by half. c. the field strength doubles d. the field strength quadruples

Wavelength of 125 meters is moving at a speed of 10 m/s. what is it's frequency?