An air conditioner is fixed to a closed room at 30°C where relative humidity is 62.5%. Dew point of the air inside the room is 22 °C. After some time when it was switched on, temperature and the relative humidity decreased to 22 °C and 40% respectively. Then the air conditioner is switched off and allowed to stay for little while and then temperature of air increased to 30 °C. New relative humidity of the room is (1) 62.5%
(2) 50%
(3) 40%
(4) 30%
(5) 25%

Astate of matter all that has define volume and can flow is a(n)

Comedians like to joke that the reason we haven’t been visited by intelligent life from elsewhere in the universe is that aliens have been monitoring earth’s broadcasts of intellectually embarrassing tv programs, like gilligan’s island, fear factor, the jersey shore, and the jerry springer showand so consider us far too primitive to merit a visit. let’s check the assertion that aliens could have been receiving them. tv programs are broadcast at a frequency of about 100mhz with about 100kw of total power in 30frames per second, which emanatesroughly uniformly in all directions. assume that interstellar space transmits these broadcasts without attenuation. no matter how smart they are, aliens would require at least one photon per frame to interpret our signals. findthe number of photons per unit time per unit area reaching a receiver on a possible planet in the nearest star system, which is about 4 light-years away (a light-year is the distance light travels in a year). if aliens aimed a receiver or detector directly at earth, how big (in diameter) would it have to be to receive a photon per frame

Based on the concept of the wave-like nature of light, huygens' theory of light postulates that the more light was "bent" by a substance the slower it would move while traversing across that substance. a) deflection b) interference c) refraction d) resonance