10 most difficult physics riddles A list of ten (out of 40) physics related questions that are the most often answered incorrectly Physics quiz This is an iron buoy. Where were its atoms formed?In a high-mass star preceding Sun. Radioactive nickel-56 (which decays to the most common isotope of iron) is the last element to be produced before the collapse of a supernova. That is why the iron was abundantly scattered into space after the supernova explosion.very hard 34% in a high-mass star preceding Sunin a high-mass star preceding Sun34%in the Sunin the Sun8%in the Earth's corein the Earth's core29%in the Earth's crustin the Earth's crust26%Created by: life-o-holic. Statistics based on 10645 answers in 2 languages »elements riddles » Who invented the mercury-in-glass thermometer?Gabriel Daniel Fahrenheit. Daniel Gabriel Fahrenheit was a German physicist, engineer, and glass blower who is best known for inventing the mercury-in-glass thermometer (1714), and for developing a temperature scale now named after him very hard 35% Galileo GalileiGalileo Galilei20%Anders CelsiusAnders Celsius29%Gabriel Daniel FahrenheitGabriel Daniel Fahrenheit35%William KelvinWilliam Kelvin13%Created by: Paweł Kołodziejczyk. Statistics based on 3623 answers in 4 languages »inventors riddles » What is the fifth state of matter?Bose-Einstien Condensate. In 1924, Two scientist Albert Einstien and Satyendranath Bose predicted the BEC ( Bose-Einstien Condensate) which is referred as the fifth state of matter. BEC is a state of matter of dilute gas of bosons cooled to temperatures very close to absolute zero.very hard 37% Bose-Einstien CondensateBose-Einstien Condensate37%PlasmaPlasma43%Fermion CondensateFermion Condensate12%GasGas5%Created by: Nabarup Ghosh. Statistics based on 802 answers in 2 languages » If a gun bullet was made of gold, what properties would it have?Armor-piercing. The density of gold is 19,320 kg/m3, which is higher than of uranium (18,800) and much higher than of lead (11,340). The armor-piercing ammo is made of uranium for its high density - golden bullets would work for this purpose even better.hard 40% it would be uselessit would be useless27%explosiveexplosive5%armor-piercingarmor-piercing40%similar in its properties to a lead bulletsimilar in its properties to a lead bullet27%Created by: Cleo. Statistics based on 7474 answers in 2 languages »guns riddles » How many patents was Marie Curie granted?None. Marie and Peter Curie refrained from patenting their newly developed methods to let the humanity benefit from these inventions. hard 41% sevenseven12%twotwo42%oneone4%nonenone41%Created by: smyru. Statistics based on 700 answers in 2 languages »chemistry riddles » What is the unit of the conductance?1S (siemens). Conductance (conductivity) is the reverse of the resistance. So it is a measure of the susceptibility of the element to the flow of the electric current. Siemens is the unit of electric conductance named after German inventor and industrialist Werner von Siemens, founder of the well known Siemens company.hard 42% 1Ω (ohm)1Ω (ohm)19%1S (siemens)1S (siemens)42%1H (henry)1H (henry)13%1T (tesla)1T (tesla)24%Created by: Paweł Kołodziejczyk. Statistics based on 3688 answers in 2 languages »electricity riddles » This is the aurora of Jupiter. What are the visible bright spots caused by?Jupiter moons. Jupiter's moons, especially Io (spot on the left), are powerful sources of auroras on Jupiter. These arise from electric currents along field lines, generated by a dynamo mechanism due to the relative motion between the rotating planet and the moving moon.hard 43% volcanic peaksvolcanic peaks4%atmospheric stormsatmospheric storms23%Jupiter moonsJupiter moons43%multiple magnetic poles of Jupitermultiple magnetic poles of Jupiter29%Created by: globalquiz.org. Statistics based on 11775 answers in 2 languages »planets riddles » What does "FM" found on radio receivers stand for?Frequency Modulation. In telecommunications and signal processing, frequency modulation (FM) is the encoding of information in a carrier wave by varying the instantaneous frequency of the wave. hard 48% Amplitude ModulationAmplitude Modulation4%Frequency ModulationFrequency Modulation48%Fast ModulationFast Modulation18%Microwaves Microwaves 29%Created by: Paweł Kołodziejczyk. Statistics based on 7219 answers in 2 languages »music riddles » In what temperatures is the superconductivity observed?Very low. Superconductivity is a phenomenon of exactly zero electrical resistance and expulsion of magnetic fields, which occur in certain materials when cooled below a characteristic critical temperature. This quantum phenomenon is impossible to be explained by the classical physics. hard 48% very lowvery low48%very highvery high13%in every temperaturein every temperature5%it depends on the material usedit depends on the material used32%Created by: Paweł Kołodziejczyk. Statistics based on 4698 answers in 2 languages »technology riddles » How many basic units are in the SI system?7. The SI system have seven basic units, it's a meter, kilogram, second, amper, kelvin and molhard 48% 6612%7748%8819%121218%Created by: Kuba5371. Statistics based on 2386 answers in 2 languages »units riddles » Play physics quiz and see all the questions.