Three identical lightbulbs are in series with a battery in a closed circuit. if a fourth identical lightbulb is added in parallel with the third lightbulb, what happens to the brightness of the first and third lightbulbs? o a. both get brighter. o b. the first lightbulb gets brighter, the third gets dimmer ° c. the first lightbulb kets dimmer, the third gets brighter. 0 d. both get dimmer

Balloon a has charge q, and identical mass balloon b has charge 10q. you hang them from threads near each other. choose all of the statements with which you agree. check all that apply. a. a and b exert the same magnitude forces on each other. b. the force that a exerts on b is 10 times the force that b exerts on a. c. the angle between the thread supporting a and the vertical is < the angle between the thread supporting b and the vertical. d. the force that a exerts on b is 1/10 the force that b exerts on a.

Hydrogen atoms are excited by a laser to the =4n=4 state and then allowed to emit. what is the maximum number of distinct emission spectral lines (lines of different wavelengths) that can be observed from this system? 8 6 2 7 4 5 1 3 calculate the wavelength of the 4⟶14⟶1 transition. =λ=

What organization and environment is described above?