Using the Bohr theory, calculate the radius of the first excited state orbit of the Hydrogen atom (Z=1).

Which transition by an electron will release the greatest amount of energy? oa ob oc od

(a) assume the equation x = at^3 + bt describes the motion of a particular object, with x having the dimension of length and t having the dimension of time. determine the dimensions of the constants a and b. (use the following as necessary: l and t, where l is the unit of length and t is the unit of time.) (b) determine the dimensions of the derivative dx/dt = 3at^2 + b. (use the following as necessary: l and t, where l is the unit of length and t is the unit of time.)

Positrons are spontaneously emitted from the nuclei of