Author Question: High frequency gratings have a. few bars within a given distance. b. many bars within a given ... (Read 45 times)

waynest · **on:** Jun 21, 2018

High frequency gratings have

a. few bars within a given distance.
b. many bars within a given distance.
c. large differences in intensity between adjacent bars.
d. small differences in intensity between adjacent bars.

Question 2

The rule that says humans should drink 8 cups of plain water per day is

a. a good one, because that is about the right amount of fluids everybody needs.
b. not so good, because we need about twice that much fluid for good health and skin.
c. unnecessary, because we take in all the fluids we need from our foods.
d. unnecessary, because we take in about half the fluid we need from our foods.