Juanita runs a restaurant. she wants to make sure that the food served by her restaurant is as clean as possible. juanita wants to find out the best way to kill or wash off any microorganisms on the fresh produce used by her cooks. which of the following is a testable hypothesis that juanita could make in order to conduct an experiment concerning her problem? a. fresh produce will taste better if it is irradiated in order to kill all of the microorganisms on the produce. b. what does the local health code say concerning the treatment of produce? c. produce must be washed under running water for 10 minutes in order to remove all microorganisms on the produce. d. what is the best way to kill or wash off any microorganisms in the fresh produce used by the restaurant?

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

Which transition by an electron will release the greatest amount of energy? oa ob oc od

Glass has a hardness that is in the middle of the hardness scale. what is the hardness of glass?