The materials carried by the circulatory system include which of the following? (1) blood, (2) hormones, (3) oxygen, (4) cellular wastes.
a. 1 only
b. 1 and 2
c. 1, 2, and 3
d. 1, 2, 3, and 4

Adouble-slit experiment is performed with light of wavelength 600 nm. the bright interference fringes are spaced 1.8 mm apart on the viewing screen.what will the fringe spacing be if the light is changed to a wavelength of 400 nm? ?

True or false: the cycle of seasons on the earth is caused by the tilt of the earth on its axis toward and away from the sun.

What is the measure of a change in an objects velocity?