The cat sensor does the work for you and keeps your cat safe. 1  With the Litter-Robot, maintenance is easy and infrequent. We recommend emptying the waste drawer once every 7-10 days for a single cat household, and more often if you have multiple cats.
It's simple. Radio waves travel unbelievably fastâat the speed of light (300,000 km or 186,000 miles per second). Analog radio. Ocean waves carry energy by making the water move up and down. In much the same way, radio waves carry energy as an invisible, up-and-down movement of electricity and magnetism.
Radio waves travel at essentially the speed of light in space, and that is a known value. So if you know the exact distance between Earth and Pluto, you can divide the distanc â¦ e by the speed to see how long a radio signal from Earth will take to reach there.ow long does it take a radio message to travel to the moon from the earth? It's roughly 1-1.5 seconds. Light (and radio) travel at 186,000 miles per second, and the moon is usually about 230,000 miles away.