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.
The speed of light (and thus radio waves) is 3x10^8 m per second. So if the planets are 401million km apart, that makes it 1337 seconds, or just over 20 minutes. And if the planets are closest together, light would take 183 seconds, slightly more than 3 minutes.t its closest Mars is about 35million miles away. At its most distant it is about 230 million miles away. The speed of radio waves is 186000 miles per second so at its furthest the radio waves will take about 20minutes to get there. Work it out on a calculator for greater accuracy.