Simple multiple choice ! 1.) in the geiger-marsden experiment, a thin gold foil was bombarded by electrons alpha particles gamma rays 2.) the chemical characteristics of an atom are determined by its: atomic number mass number binding energy number of isotopes 3.) calculate the speed of the electron of a hydrogen atom if it is in the fifth circular orbit. 4.4 x 10^5 1.1 x 10^7 any is !

Which of the following changes will result in a stronger electromagnet? a. using fewer coils of wire b. using a higher voltage c. using a shorter nail d. using a longer wire

Dao makes a table to identify the variables used in the equations for centripetal acceleration. what quantities belong in cells x and y?

An electron is ejected into a horizontal uniform e⃗ field at a parallel horizontal velocity of v0. assume the electron's initial position x0, initial velocity v0, time t, magnitude of electric field e, electron's mass m, and the magnitude of the electron's charge |e|. ignore the force that earth exerts on the electron. assume the e⃗ field is in the same direction as the initial velocity. part a define the equation for the electron's velocity. express your answer in terms of the variables v0, |e|, t, e, and m.