2 An electron is confined in a one-dimensional potential energy well of length 0-3 nm. Find (a) the kinetic energy of the electron when in the ground
state and (b) the spectral frequency resulting from a transition from the next
highest state to the ground level.​

The answer is b on plato.

The water cycle increase the water content in the earth atmosphere

Answer is: value of q is 5·10⁻⁶m.chemical reaction: mg²⁺(aq) + co₃²⁻(aq) → mgco₃(s).c(mg²⁺) = 2.5·10⁻³ m; concentration of magnesium cations.c(co₃²⁻) = 2.00·10⁻³ m; concentration of carbonate anions.q = c(mg²⁺)  · c(co₃²⁻).q = 2.5·10⁻³ m  · 2.00·10⁻³ m.q = 5·10⁻⁶m.q = 0.000005 m.

Steel shot weighs about two-thirds as much.hoped i can i get brainliest