5. a proposed space station consists of a circular tube that will rotate about its center, like a bicycle
tire. the circle formed by the tube has a diameter of 1.1km. what must be the rotation speed in
revolutions per day, if an effect equal to 0.9 g's is to be felt? (do on back)

Ais useful when you need a simple machine to you separate two things. a. lever b. screw c. pulley d. wedge

Write the function getkthdigit(n, k) that takes a possibly-negative int n and a non-negative int k, and returns the kth digit of n, starting from 0, counting from the right

Large electric fields in cell membranes cause ions to move through the cell wall. the field strength in a typical membrane is 1.0 x 10 7 n/c. what is the magnitude of the force on a calcium ion with charge +e? what is its acceleration? is it possible for a particle with the same charge as as calcium to have a different acceleration if placed at this location? what would change the acceleration: mass of the particle? diameter of the particle?