Calculate the wavelength of light that is required to excite the π electrons of β-carotene from n=11 to n=13 (unit: nm, 3-digit accuracy). Assume that L=17.7 Å. Please refer to Math Reference.

Acapacitor is storing energy of 3 joules with a voltage of 50 volts across its terminals. a second identical capacitor of the same value is storing energy of 1 joule. what is the voltage across the terminals of the second capacitor?

Air conditioners not only cool air, but dry it as well. suppose that a room in a home measures 5.0m×9.0m×2.4m . if the outdoor temperature is 30 ∘c and the vapor pressure of water in the air is 85 % of the vapor pressure of water at this temperature, what mass of water must be removed from the air each time the volume of air in the room is cycled through the air conditioner? the vapor pressure for water at 30 ∘c is 31.8 torr.

Examples of states of consciousness include a. daydreaming b. dreaming during sleep c. hypnosis d. all of the above