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difference between clucth and coupling
difference between coupling and socket
Relation between phase difference and path difference is path difference/wavelength=phase difference/2*pi
There is no difference between micrometres and microns
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Dirigibles are lighter-than-air aircraft that can be maneuvered by their own power. There are different kinds of dirigibles, such as blimps and airships, but all are distinguished from other lighter-than-air craft, such as balloons, which do not have their own steering and power sources.
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One of the original purposes was to be a mooring mast for dirigibles/blimps but it was rarely (if ever) used as that..
blimps are oval shaped
Beside the actual design of course, the difference is that airplanes use their engines/propellers and wing to create air flow and fly while blimps, zeppelins, and the like use hot air to propel themselves up and increase or decrease hot air in the balloon to go up or down. This is the main difference between the two aircrafts.
Airships are also, and more commonly, known as zeppelins. The term airship is also used to refer to an airplane, but this usage is incorrect, as they have two different meanings. Airships might also be called blimps or dirigibles.
The last rigid dirigible built in the United States was the Macon, ZR-5. Non-rigid dirigibles (blimps) are still being built, although Goodyear's Mayflower was the last one to be built by that company.
No, blimps do not contain lithium. All blimps in current service use helium
Today's blimps are not filled with flammable hydrogen gas like Hindenburg was, but normally the non-flammable helium.
No. Blimps require atmosphere.
Count Ferdinand von Zeppelin invented the first practical dirigibles in the late 1800's but he didn't fly the first ones till about 1910. There were previous balloons called dirigibles, but they did not have a frame.