___is the process that exchanges gases between body and the outside air.

Name three different units of energy used to measure heat and describe what type of situations each is usually used.

The focal length of a relaxed human eye is approximately 1.7 cm. when we focus our eyes on a close up object, we can change the refractive power of the eye by about 16 diopters. (a) does the refractive power of our eyes increase or decrease by 16 diopters when we focus closely? explain. (b) calculate the focal length of the eye when we focus closely.

Dao makes a table to identify the variables used in the equations for centripetal acceleration. what quantities belong in cells x and y?