A common mind teaser used in some job interviews... How would you sweet an aeroplane without scales?

Unless you"re going for a role which calls for you to sweet aeroplanes, this question is most likely to be an ext about assessing your "out of the box" thinking.

Ideas include:

Put the aeroplane ~ above a ship and see how much it submerges into the water. Note the allude on the side of the ship, then take the airplane off and put weights ~ above the ship and see how many are needed prior to the delivery submerges come the same pointUse the tire pressure, tire surface ar area emotional the ground, physics formula pressure = pressure / surface Area; etcNewtons 2nd law

Any various other ideas? allow us recognize in the comments.

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1. SHORTCUTS: check the mfr"s website for a spec sheet. Failing that, contact their PR department. Failing that, speak to their sales department and tell castle you want to to buy one or two, but first you need to understand the weight to make certain your private runway you"re having constructed can take care of it.2. MATHS: sum of the replacement parts - works just if the directory or parts/maintenance hand-operated is 100% complete and you totally empty the fuel tank(s). 3. MECHANICAL: A pulley or lever set up with counterweights (if those dont count as scales.)4. CYNICAL: to convince a smartphone manufacturer the the shape of the cockpit window violates a architecture patent castle hold; download the succeeding lawsuits" transcripts.5. SUBVERSIVE: email the mfr"s security chief a do-not-reply memo stating new, immediate Dept of landscape Security policy requiring immediate online disclosure of all aircraft weights and also measures. Note: carry out NOT use FAA logo - the DHS is still also disorganized to have effective regulation capture, but wields far more power than the NTSB.6. WHIMSICAL: autumn it turn off the Leaning Tower of Pisa and count how countless coins bounce increase in the air once it impacts. You won"t learn the weight, but hey, it"s a complimentary trip to Italy and also the video will go viral. - QuezaraT (19 Dec 2013)-At the minute a aircraft takes off, calculation the bordering air constants, pressure, temperature, etc. And also the angle of the wings and the speed of the airplane. V all this information, that is possible, no for me personally, but, someone with a background in this can calculate the pressure at liftoff which need to be equal to the force keeping it on the ground, division by gravity and you have actually the weight of the plane. - Poppo (7 jan 2014)Submerge the airplane in water, best in pure water, climate attach small inflatable devices evenly until the aircraft begins to rise. Once it rises and just comes the end of the water, you can calculate the volume and buoyant forces and essentially go v the same procedure as if on a boat. - Poppo (7 january 2014)Find out the make and also model of the aircraft and then use Google to research it online. - id36 (10 jan 2014)Gay-Lussac"s Law: The press Temperature Law. A chamber the is compressable (to withstand very high pressure of gravity) containing a gas will rise in temperature. Ns is proporitonal come T. - arthur pletcher (2 Feb 2014)Fill large container with water, rise aeroplane in water, collection water the overflows, and also measure that is volume in liters. This yields mass in kilograms. Variation: use a cylindrical tank yet don"t to fill to top; multiply increase in water level through pi and the square the the tank radius to acquire volume of water displaced. Note: If aeroplane won"t float in water, use a denser liquid favor mercury. One more idea: transfer it come the top of mount Everest and also see exactly how much the rotation that the planet slows down. - Ron (3 Jul 2014)1) I will weigh part scales.2) i will add the "scales" to aeroplane and weigh it.3) from step 2 deduct step 1 to arrive at the weight of aeroplane without "scales" - Prashanth (16 Mar 2015)

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