In an electron microscope, electrons are accelerated to great velocities. Calculate the wavelength, in m, of an electron traveling with a velocity of 7.0 megameters per second. The mass of an electron is 9.1 * 10^-28 g?
a. 1.0 * 10^-13 m
b. 1.0 *10^-7m
c. 1.0m
d. 1.0 *10^-10 m
e. 2.5m