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 32% sevenseven441twotwo1735oneone136nonenone1116chemistry 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 46% Radioactive elementsRadioactive elements1109Electrical chargesElectrical charges1474AlcoholAlcohol129AcidsAcids490electricity 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 52% low temperatureslow temperatures1568lack of oxygenlack of oxygen4580poor gravitypoor gravity1243cosmic rayscosmic rays8095planets 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% 66521772054889121212748units 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 49% It is a measure of the disorder in a closed system.It is a measure of the disorder in a closed system.3183It is a measure of system's sizeIt is a measure of system's size683Both answers are correctBoth answers are correct1249None of above answersNone of above answers1306space 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 31% Bose-Einstien CondensateBose-Einstien Condensate630PlasmaPlasma1053Fermion CondensateFermion Condensate258GasGas79 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 93% glacierglacier461solidified CO2solidified CO213226legendary alchemical substancelegendary alchemical substance300meringue dessertmeringue dessert204ice 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 54% skyscrapersskyscrapers356the future the future 1324dinosaursdinosaurs5761early Earth with no life yetearly Earth with no life yet3088astronomy 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 57% oneone1925twotwo2936threethree7833fourfour826elements 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)10801S (siemens)1S (siemens)21721H (henry)1H (henry)6701T (tesla)1T (tesla)1339names riddles » Play physics quiz and see all the questions.