The fingers on your hand are approximately 0.5 cm apart. ignoring atmospheric blurring, what size mirror would a spy satellite have to have in order to tell how many fingers you are holding up at it using visible light (wavelength = 500 nm) at an altitude of 200 km?

The intensity, or loudness, of a sound can be measured in decibels (db), according to the equation , where i is the intensity of a given sound and is the threshold of hearing intensity. what is the intensity, in decibels, [i(db)], when ? use a calculator. round to the nearest whole number. 8 9 19 80

The passage that directs air to the lungs is called a. diaphragm. b. larynx. c. bronchi. d. pharynx.

An equinox occurs when a. neither end of earth's axis is tilted toward or away from the sun. b. the north end of earth's axis is tilted away from the sun. c. the north end of earth's axis is tilted toward the sun. d. earth's axis is parallel to the sun's rays. select the best answer from the choices provided a b c d