Technology questions This is a list of recently added questions about technology. Play technology quiz and see all the questions. 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 52% Radioactive elementsRadioactive elements463Electrical chargesElectrical charges849AlcoholAlcohol62AcidsAcids252electricity riddles » Which planet is this globe with such a bland look without any details?Uranus. Upper parts of Uranus' atmosphere are composed of condensed hydrocarbons, mainly methane crystal particles. Contrary to the rest of gas giant planets, it's hard to observe clouds and storm bounds.Created by: smyruhard 59% UranusUranus5439NeptuneNeptune2558MercuryMercury513VenusVenus691planets riddles » How can you cut a diamond?Using a diamond. Diamond is a hardest substance in the world and hence as a very strong bonding between the atoms. hence it can be cut only by using a diamond Created by: Shruthi Srinivasanvery easy 82% using a knifeusing a knife34using a diamondusing a diamond1870using goldusing gold72using a gasusing a gas300materials riddles » Which numeral system was in use in ancient Sumer and Babilon?Sexagesimal. Remnants of highly composite sexagesimal system are in use even today for measuring angles, geographic coordinates and especially time. An hour of time is divided into 60 minutes, which in turn are divided into 60 seconds. Created by: smyruvery hard 32% octaloctal2106binarybinary1919decimaldecimal2503sexagesimalsexagesimal3175numbers 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 temperatures1256lack of oxygenlack of oxygen3555poor gravitypoor gravity1033cosmic rayscosmic rays5542astronautics riddles » The closest star to Sun is Proxima Centauri. In which direction we would need to look to see it on the night sky?It is not visible at all. Proxima Centauri is a red dwarf and its average brightness is very low. That is why even though it is closest to Sun, it was discovered not until in 1915.Created by: Ineshard 55% Great BearGreat Bear1242SiriusSirius1402CassiopeiaCassiopeia869it is not visible at allit is not visible at all4396stars riddles » What is the Greek name for amber?Elektron. Words like "electricity" come directly from the name of amber. Already the ancient Greeks noticed that this stone has a certain mysterious property: when rubbed with fur, it begins to attract particles of dust...Created by: Marta_Smolarekhard 44% particlonparticlon674elektronelektron2464amberionamberion1447atomiosatomios899gemstones riddles » Maria Skłodowska-Curie was committed to her job. Did she have any children?Her daughter was awarded the Nobel Prize. Her first daughter, Irene, decided to follow her mother's life path and received the Nobel Prize in chemistry in 1935. Her second daughter, Eva, a writer and politician, was known as the "First Lady of UNICEF". She was also nominated for the Pulitzer Prize in 1944.Created by: naypaxhard 59% She didn't want to and thus didn't have children.She didn't want to and thus didn't have children.2302She was sterile as a result of the radiation.She was sterile as a result of the radiation.1850Her daughter was awarded the Nobel Prize.Her daughter was awarded the Nobel Prize.9676Her sole daughter died at the age of 2.Her sole daughter died at the age of 2.2394scientists riddles » Which supercar is not a hybrid vehicle?Bugatti Veyron has a W16 petrol engine (8,0L, 1001KM). The other cars are equipped with both gasoline and electric engines.Created by: Niezgodnahard 51% Ferrari LaFerrariFerrari LaFerrari778Bugatti VeyronBugatti Veyron2280Porsche 918 SpyderPorsche 918 Spyder659McLaren P1McLaren P1670cars riddles » 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% glacierglacier395solidified CO2solidified CO210704legendary alchemical substancelegendary alchemical substance270meringue dessertmeringue dessert176ice riddles » Play technology quiz and see all the questions.