I was just wondering since most pool pumps have a 1 1/2 pipe outlet on them, has anyone ever done this or ever heard of it being done? I was thinking about buying a 1 1/2 fire hose just for emergencies. Thnaks!
A stealth satellite could be in a polar orbit that avoids a transit with the Sun, provided it has enough fuel to adjust it for the seasons. There are also libration points that can avoid transits. New meta-materials promises to make the satellites truly invisible. Of course spy satellites will soon be replaced by lower cost high altitude blimps and UAV's which can be more readily deployed in larger numbers and the course of a blimp or UAV need not be predictable as a satellite's would be. A military stealth satellite would likely be RTG powered and highly reflective both in light and radio waves. It would just be designed to reflect away from the observer in much the same way an illusionists uses mirrors to render an area invisible to the audience. That's actually how our stealth aircraft work, they reflect radar away from the source.One way to be stealth would be to be in a polar lunar orbit offset enough to not transit the Moon but still have a portion of the orbit blocked from the Earth. Maneuvers with chemical thrusters to ensure no visible transits occur during the next orbit could be made when hidden by the Moon, the satellite could be crashed on the far side of the Moon when it's fuel has been depleted. One of the reasons why radar stealth is no longer secret is that radar bases can now detect them from the reflected transmissions from another radar base or from background em sources such as cell phone traffic. Stealth is only well known to us because it's no longer on the leading edge of military technology. The launch of a satellite could not be stealth, it would have to be piggybacked with another launch and then maneuver away with low thermal radiation thrusters such as ion thrusters.
link one has a diagram you can draw showing crest, wave length through amplitude. All waves have crest (high points), troughs (low points), a wavelength (the distance from one crest to another or one trough to another), amplitude (the height of a crest or trough), and a frequency (the number of complete wavelengths that pass a given point in a second.) the faster the wave completes its cycle the shorter the wavelength For example if the wave completes a million cycles a second (what we call 1 Mhz) then the wavelength will be 300,000,000 divided by 1,000,000 which is 300 metres. So the faster the wave oscillates the shorter the wavelength of the signal Wind does not have an effect on radio waves. Radio waves have a long wavelength. Wind cannot affect radio waves because the air particles associated with wind are far too small for the radio wave to bounce off of. Radio waves can only bounce off of large objects. Radio waves are constantly traveling through the air in your community. They're invisible, like light waves. Together, radio and light waves are part of the spectrum of electromagnetic energy. The radio waves are the longest in the spectrum, making them easiest to generate and transmit over long distances. This physical property makes radio waves an ideal means of communication. The air in your community and in your room is an ideal transmitter of the radio waves. The air allows the radio waves to travel comfortably through. Many materials, however, do not allow the radio waves to travel through; rather they reflect the radio waves, causing them to bounce back. The metal of an airplane's wing, the rock of a mountain, and the water in a storm cloud are all reflective materials. When radio waves hit them, the waves bounce back.
omg! i ttly remember doing this last year!uummm. so a wave is just like a squiggaly line thingy. and the crest i think is the mid point. uuuugggghhhim so sorry i like ttly forgot all of this :(
