On the recommendation of his vet and a small sample package of Cat Attract, we tried it. To make a long story short, IT WORKS! I have ordered it (bought two bottles since I have three cats and three litter boxes) and when I get down to one bottle, will reorder some more.
The basic equation for solving this is: d = vt + (1/2)at2. where d is distance traveled in a certain amount of time (t), v is starting velocity, a is acceleration (must be constant), and t is time. This gives you the distance traveled during a certain amount of time. If you know any 3 of those things, you can plug them in to solve for the 4th.
For the ISS, at an altitude of about 250 miles (400 km), that forward velocity is about 17,500 mph (7.8 km/s). Where G is the gravitational constant. M is the mass of the body being orbited (Earth). R is the distance from the center of the Earth to the object in orbit.