Athermohaline current is a current which is affected by

Calculate the mass of an object that has a momentum of 100kg x m/sec and velocity of 4 m/sec

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

If anyone who can me with this hw? i would really appreciate it