Consider a system of two electrons, each with i 1 and s-h. (a) what are the possible values of the quantum number for the total orbital angular momentum l -li +l2? (b) what are the possible values of the quantum number s for the total spin s-s1 + s2? (c) using the results of parts (a) and (b), find the possible quantum numbers j for the combination j- l+s. (d) what are the possible quantum numbers j1 and j2 for the total angular momentum of each particle ul l1 + s1 and ½-l2 + ss). (e) use the results of part (d) to calculate the possible values of from the combinations of j1 and j2

Which statement correctly describes the current in a circuit that is made up of any two resistors connected in parallel with a battery? a. the current in the battery and in each resistor is the same b. the current the battery equals to the sum of the currents in the resistors c.the current in the battery is less than the current in either resistor d. the current in the battery equals to the product of the currents in the resistors

Assume that a person skiing high in the mountains at an altitude of h = 15100 ft takes in the same volume of air with each breath as she does while walking at sea level. determine the ratio of the mass of oxygen inhaled for each breath at this high altitude compared to that at sea level. assume that the air composition (i.e. % of air that is oxygen) is the same at sea level as it is at 15100 ft.

As part of your daily workout, you lie on your back and push with your feet against a platform attached to two stiff springs arranged side by side so that they are parallel to each other. when you push the platform, you compress the springs. you do an amount of work of 79.0 j when you compress the springs a distance of 0.230 m from their uncompressed length. (a) what magnitude of force must you apply to hold the platform in this position? (b)how much additional work must you do to move the platform a distance 0.230 m farther? (c) what maximum force must you apply to move the platform a distance 0.230 m farther?