Mary discovered that the cell membrane of a bacteria acts like a fence because it keeps some things in and other things out.

a. observation

b. analogy

c. inference

mary walked into her room where her little son was playing, found a broken window, and thought immediately that her son had broken it.

a. observation

b. analogy

c. inference

mary noticed that her counter top was warm to the touch.

a. observation

b. analogy

c. inference

mary noticed that the side walk was wet and thought that it may have been that the sprinklers had been on recently.

a. observation

b. analogy

c. inference

mary counted and recorded 20 heart beats in 10 seconds.

a. observation

b. analogy

c. inference

the lecturer compared the human eye to a camera lens.

a. observation

b. analogy

c. inference

The compound methyl butanoate smells like apples. its percent composition is 58.8% c, 9.9% h, and 31.4% o. what’s the empirical formula ?

Hot air balloons float in the air because of the difference in density between cold and hot air. in this problem, you will estimate the minimum temperature the gas inside the balloon needs to be, for it to take off. to do this, use the following variables and make these assumptions: the combined weight of the pilot basket together with that of the balloon fabric and other equipment is w. the volume of the hot air inside the balloon when it is inflated is v. the absolute temperature of the hot air at the bottom of the balloon is th (where th> tc). the absolute temperature of the cold air outside the balloon is tc and its density is ďc. the balloon is open at the bottom, so that the pressure inside and outside the balloon is the same. as always, treat air as an ideal gas. use g for the magnitude of the acceleration due to gravity.

What are fructose and glucose an example of?