Amassless spring is attached to a support at one end and has a 2.0 μc charge glued to the other end. a -4.0 μc charge is slowly brought near. the spring has stretched 1.2 cm when the charges are 2.2 cm apart. what is the spring constant of the spring? express your answer with the appropriate units.

In an experiment, how can i change human errors? be specific.

Consider a hydrogen atom in the ground state. what is the energy of its electron? =e= jj now consider an excited‑state hydrogen atom. what is the energy of the electron in the =5n=5 level? =e5= j

This is a form of winter precipitation. it is frozen precipitation falling as ice pellets. snowflakes melt into raindrops as they pass through a thin layer of warmer air. the raindrops then refreeze into particles of ice when they fall into a layer of sub-freezing air near the surface of the earth. this precipitation is called a) hail. b) rain. c) sleet. d) snow.