Predict the positions in cm−1 (wavenumbers) of the first three absorption bands in the rotational spectrum of 14N2 (re = 1.094 ˚A, mass=14.00 u. a.) and 1H2 (re = 0.7417 ˚A, mass=1.008 u. a.) using the rigid rotor model.

Which changes of state do the labels represent? a: b: c:

(2) (a) you have a simple circuit that consists of only a battery (δvbat=1.5v) and two resistors with resistance r1=10ω and r2=5ω, connected in series with each other. what is the current running through the battery? (b) you re-arrange your circuit so now r2 is attached in parallel to r1 rather than in series. what is the current running through the battery? (c) you add an additional resistor r3=7ω on the same branch as r2. what is the current running through the battery? (d) what is the power dissipated in r3?

Greg drew a diagram to compare two of the fundamental forces. which labels belong in the areas marked x, y and z? gravitational force electromagnetic force x. attractive y repulsive z: infinite range x: infinite range y attractive z. repulsive x. always attractive y: infinite range z: attractive or repulsive x. attractive or repulsive y infinite range z: always attractive