It is the end of the semester, so you celebrate by launching your book (closed with rubber bands of course) from a cannon which is inclined at 45° to the horizontal and facing east (you are at the lattitude of a mountn write an essay backed up with the pertinent formulas and calculations that explains qualitatively (and quantitatively, to the extent that you can) the motion of your book through space. consider and comment on the effects d ity near the surface of the earth, air friction, the rotation of earth and pseudo forces, the shape of the book and its rotation, universal gravitation, sp relativity, and chaos theory. it might be to consider a large range of initial velocities: from so small that the book just barely leaves the cannon, to so large that you must consider special relativity ue to: grav-

Which property of fossils allow scientists to determine the relative rock ages..

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

Need this now! do pilots live long