Which two systems work together to regulate blood flow and oxygen during exercise? A. respiratory and skeletal B. endocrine and digestive
C. digestive and circulatory
D. circulatory and respiratory

Athin nonconducting rod with a uniform distribution of positive charge q is bent into a circle of radius r. the central perpendicular axis through the ring is a z-axis, with the origin at the center of the ring. a) what is the magnitude of the electric field due to the rod at z = 0? n/c (b) what is the magnitude of the electric field due to the rod at z = infinity? n/c (c) in terms of r, at what positive value of z is that magnitude maximum? r (d) if r = 4.00 cm and q = 9.00 µc, what is the maximum magnitude? n/c

Sunidhi made a study chart about changes in states of matter. which headings best complete the chart?

What is the coldest temperature ever recorded in san antonio?