Ethanol is flowing in a pipe and at all points completely fills the pipe. At point AA in the pipe the gauge pressure is pp and the cross-sectional area of the pipe is 0.0500 m2m2. The other end of the pipe (point BB) is open to the air, has cross-sectional area 0.0200 m2m2, and is at a vertical height of 9.00 mm above point AA. Part A What must the gauge pressure pp be at AA if the volume flow rate out of the pipe at point BB is 0.0800 m3/sm3/s

The 20@kg wheel has a radius of gyration about its center g of kg = 300 mm. when it is subjected to a couple moment of m = 50 n # m, it rolls without slipping. determine the angular velocity of the wheel after its mass center g has traveled through a distance of sg = 20 m, starting from rest.

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

Gunpowder residue is most likely to show up where on a shooters hands