Physics questions This is a list of recently added questions about physics. Play physics quiz and see all the questions. 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. Created by: smyruvery hard 39% sevenseven58twotwo189oneone17nonenone171chemistry riddles » What is held in Leyden jar?Electrical charges. Leyden jar is a device that stores static electricity between two electrodes on the inside and outside of a glass jar. It was the first known form of a capacitor (condenser). The glass plays the role of s dielectric material. Created by: smyruhard 51% Radioactive elementsRadioactive elements428Electrical chargesElectrical charges759AlcoholAlcohol52AcidsAcids234electricity riddles » Mars colonisation is a hype topic. What is the biggest threat for those wishing to take a part in a journey to Mars?Cosmic rays. The only efficient protection against high energetic cosmic radiation, one we are granted with, is Earth magnetic field. Both during a long flight to Mars and through the stay on the planet, that did not form electromagnetic field, astronauts would be exposed to ionization. Created by: smyruhard 48% low temperatureslow temperatures1236lack of oxygenlack of oxygen3489poor gravitypoor gravity1016cosmic rayscosmic rays5388planets 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 molCreated by: Kuba5371hard 48% 66289771083884421212418units riddles » What is entropy?It is a measure of the disorder in a closed system. It is a measure of the disorder or randomness in a closed system. The second law of thermodynamics states that if isolated thermodynamic system spontaneously evolves into another state of equilibrium, its entropy will always increase. The term was invented by Rudolf Clausius.Created by: Władysław Pękalahard 51% It is a measure of the disorder in a closed system.It is a measure of the disorder in a closed system.1783It is a measure of system's sizeIt is a measure of system's size382Both answers are correctBoth answers are correct661None of above answersNone of above answers630space 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.Created by: Nabarup Ghoshvery hard 38% Bose-Einstien CondensateBose-Einstien Condensate268PlasmaPlasma300Fermion CondensateFermion Condensate95GasGas36 What is dry ice?Solidified CO2. Dry ice is used in refrigeration. It has an interesting property: it maintains a constant temperature of -78.5C in a warmer environment. This is because dry ice does not melt and sublimes directly into the gaseous form.Created by: Niezgodnavery easy 92% glacierglacier380solidified CO2solidified CO210408legendary alchemical substancelegendary alchemical substance262meringue dessertmeringue dessert173ice riddles » Imagine that a distant civilization watches the Earth from 100 million light years away. What can they see right now?Dinosaurs. If a distant civilization watches the Earth right now, it sees its image from the past.Created by: Krzysztof Moskalhard 55% skyscrapersskyscrapers269the future the future 878dinosaursdinosaurs3999early Earth with no life yetearly Earth with no life yet2033astronomy riddles » How many hydrogen isotopes occur naturally on the Earth?Three isotopes of hydrogen occur naturally on the Earth: the most frequent protium (1H), deuterium (2H) and tritium (3H). Other isotopes of hydrogen (4H-7H) were created in laboratories and are highly unstable.Created by: Paweł Kołodziejczykhard 59% oneone1078twotwo1695threethree4937fourfour556elements 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.Created by: Paweł Kołodziejczykhard 41% 1Ω (ohm)1Ω (ohm)6961S (siemens)1S (siemens)14881H (henry)1H (henry)4811T (tesla)1T (tesla)897names riddles » Play physics quiz and see all the questions.