If we do find life on mars, what might be some ways to check whether it formed separately from earth life, or whether exchanges of material between the two planets meant that the two forms of life have a common origin?

What are segments of dna that code for a particular trait. a combination of dna and proteins make up what

The 10-kg double wheel with radius of gyration of 125mm about o is connected to the spring of stiffness k = 600 n/m by a cord which is wrapped securely around the inner hub. if the wheel is released from rest on the incline with the spring stretched 225 mm, calculate the maximum velocity v of its center o during the ensuing motion. the wheel rolls without slipping

You are given a vector a = 125i and an unknown vector b that is perpendicular to a. the cross-product of these two vectors is a × b = 98k. what is the y-component of vector b?