Physics questions This is a list of recently added questions about physics. Play physics quiz and see all the questions. How far away did the lightning strike if it took 3 seconds to hear the thunder?Approx. 1 km. Sound travels through air at 331.2 meters per second, so after 3 seconds it would travel approximately 1 kilometer.Created by: Ninjaivery hard 32% approx. 0.3 kmapprox. 0.3 km77approx. 1 kmapprox. 1 km239approx. 3 kmapprox. 3 km323approx. 9 kmapprox. 9 km93weather riddles » Whose quote is that: "Now I am become Death, the destroyer of worlds."?Robert Oppenheimer was the wartime head of the Los Alamos Laboratory and is among those who are credited with being the "father of the atomic bomb" for their role in the Manhattan Project. After the first test of the atomic bomb, Oppenheimer remarked that it brought to mind words from the Bhagavad Gita: "Now I am become Death, the destroyer of worlds."Created by: Ninjaihard 48% Alexander FlemingAlexander Fleming700Robert OppenheimerRobert Oppenheimer1818James FranckJames Franck448Joseph StalinJoseph Stalin745quotes riddles » What kind of an electromagnetic waves does the typical tv remote use to send signal?Infrared radiation. Early television remote controls used ultrasonic tones. Present-day remote controls are commonly consumer infrared devices which send digitally-coded pulses of infrared radiation to control functions such as power, volume, channels, etc.Created by: Ninjaieasy 75% radio wavesradio waves1761infrared radiationinfrared radiation7652ultravioletultraviolet430ultrasoundultrasound333TV riddles » What resistor should be connected to the 12 Volt battery with a current flow of 4 Amp?3 Ohm. According to Ohm's law, the resistance (R) of an object is defined as the ratio of voltage across it (V) to current through it (I) : R = V/I. R = 12/4 = 3.Created by: Ninjaihard 59% 48 Ohm48 Ohm1884 Ohm4 Ohm2613 Ohm3 Ohm88512 Ohm12 Ohm154electrics riddles » Who Discovered Magnetic Field? Hans Christian Oersted. Danish physicist and chemist Hans Christian Oersted (1777-1851) discovers in 1820 that electric current affects a compass needle and create magnetic fields. He was the first scientist to find the connection between electricity and magnetism. He is remembered today for Oersted's Law. Created by: Tschukavery hard 34% André-Marie Ampère André-Marie Ampère 46Alessandro VoltaAlessandro Volta58Hans Christian OerstedHans Christian Oersted116Michael Faraday Michael Faraday 114Denmark riddles » What is "Aqua regiaor" ?A mixture of two acids. Aqua regiaor ("king's water") is a mixture of nitric acid and hydrochloric acid, optimally in a molar ratio of 1:3. Aqua regia is a yellow-orange fuming liquid, so named by alchemists because it can dissolve the noble metals gold and platinum, though not all metals. Created by: Marcelhard 45% a mixture of two acidsa mixture of two acids905water with the addition of a small amount of goldwater with the addition of a small amount of gold383the mythic substance that the alchemists wantedthe mythic substance that the alchemists wanted267hydrated gold oxidehydrated gold oxide427legends riddles » What did Isaac Newton discover? The law of universal gravitation. Newton's law of universal gravitation states that a particle attracts every other particle in the universe using a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers. Created by: Tschukahard 50% The law of universal gravitationThe law of universal gravitation1075The law of universal attractionThe law of universal attraction498The law of universal dynamicsThe law of universal dynamics545The law of a universal parableThe law of a universal parable18discoverers riddles » What type of energy is stored by a spring when it is stretched?Elastic potential energy is energy stored as a result of applying a force to deform an elastic object. The energy is stored until the force is removed and the object springs back to its original shape, doing work in the process. Many objects are designed specifically to store elastic potential energy, for example: The coil spring of a wind-up clock. An archer's stretched bow. Created by: Tschukaeasy 72% Internal mechanical energyInternal mechanical energy50Gravitational potential energy Gravitational potential energy 17Excitation energyExcitation energy24Elastic potential energyElastic potential energy238energy riddles » The idea that the nascent universe passes through the phase of exponential expansion, which was driven by the positive density of vacuum energy, is called;Cosmic inflation. Alan Guth formally proposed the idea of cosmic inflation in 1981, the idea that the nascent universe passed through a phase of exponential expansion that was driven by a positive vacuum energy density (negative vacuum pressure).Created by: Tschukavery hard 27% Cosmic inflationCosmic inflation1300Grand unification theoryGrand unification theory1232Theory of SupersymmetryTheory of Supersymmetry745All answers are correct.All answers are correct.1521universe riddles » The bright circle around the Sun seen in the picture is known as a halo. What causes it?Refraction of light in ice crystals. Halo is the name for a family of optical phenomena produced by light interacting with ice crystals suspended in the atmosphere. Halos can have many forms, ranging from colored or white rings to arcs and spots in the sky. Among the best known halo types are the circular halo (properly called the 22° halo), Other common optical phenomena involving water droplets rather than ice crystals include the glory and the rainbow. Created by: Tschukavery hard 36% refraction of light in ice crystalsrefraction of light in ice crystals3514refraction in the lens of the eye or lensrefraction in the lens of the eye or lens3072refraction of light in water dropsrefraction of light in water drops2483reflections from the water surfacereflections from the water surface671atmosphere riddles » Play physics quiz and see all the questions.