List two things phytoplankton need to survive. name at least two special adaptations phytoplankton have to stay in the photic zone.

Atomic nuclei of almost all elements consist of

What is the relationship between the direction of motion of the balloon and the wind currents

Abeverage can is made of 3004-h19 aluminum alloy (elastic modulus 69 gpa, tensile yield strength 285 mpa, density 2.72 g/cm^3). the dimensions on the can are approximated as a thin-walled cylinder with a height of 4.83 inches, diameter of 2.60 inches. empty the can has a mass of 14.2 g. determine: a. the wall thickness of the cylinder b. assuming a pinned-pinned condition what is the critical load? c. assuming a fixed-fixed condition what is the critical load?