David fee studies waves so deep and low that humans cannot hear them what are those low frequencies

Suppose you use a machine that gives you a mechanical advantage of 2 to achieve an output force of 30newtons what must the input force be

For this car, predict the shape of a graph that shows distance (x) versus time (t). note that time is the independent variable and will be on the bottom axis. need asap

Newtons view of arrangement of the universe. don't copy from anywhere.