A life-line is to be thrown from a ship 30 m above sea level to a drowning crew person. If the victim is 30 m horizontally from the ship:
a. With what horizontal speed should the line be thrown?
b. What is the life-line's impact velocity?

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

Greg drew a diagram to compare two of the fundamental forces. which labels belong in the areas marked x, y and z? gravitational force electromagnetic force x. attractive y repulsive z: infinite range x: infinite range y attractive z. repulsive x. always attractive y: infinite range z: attractive or repulsive x. attractive or repulsive y infinite range z: always attractive

What kind of simple machine is a catapult?