Find the potential difference av, required to stop an electron (called a 'stopping potential) moving with an initial speed of 1.89 x 10' m/s. (b) would a proton traveling at the same speed require a greater or less magnitude potential difference? explain this answer has not been graded yet (c) find a symbolic expression for the ratio of the proton stopping potential and the electron stopping potential, av, jav, the answer should be in terms of the proton mass m, and electron mass me

wavelength divides in half and speed stays the same.

see the picture for the vector

the magnitude of the vector by pythagorean theorem

r = √( (-10)^2 + (3)^2 ) = √109

magnitude = √109 units

the direction angle between vector and x-axis is

tan^(-1)(3/10) = 16.699

so the direction is approximately 16.7 degrees north of west

molecules are free to separate from each other and will take on the shape of the container. molecules move completely at random and high speeds. they vibrate in a fixed position and do not move around much. molecules expand to the edge of their container.