- REFRIGERATOR The earliest method of refrigeration was the storage of food in caves and cold springs . This method of storing food in cold places slowly evolved, as people began keeping food in their cellars , in their outdoor window boxes, in the snow, or underwater in nearby lakes, streams or wells. The invention of the icebox led to more efficient refrigeration. Ice was delivered to houses by delivery men and was used in wooden iceboxes that were lined in tin or zinc and insulated with sawdust or seaweed. The use of ice for refrigeration continued until World War I, when mechanical refrigeration came on the market. The first electric refrigerators with freezer compartments came on the market in the 1920s and 1930s . However, the mass production of refrigerators began after World War II, when researchers had been able to successfully adapt large refrigeration systems for use in homes and shops. In the 1950s and 1960s, the invention of automatic defrost and automatic ice makers further improvec I the efficiency of refrigerators Refrigerators also became available in a wide variety of size, color, and design. OTBeTbTe Ha Bonpoc What were the major developments in refrigeration after the ice box?
- 3aòanue 2. Kakoi na 6oxee ònumeribilibtii cpox?Houemy? 3ay-wBas TeKCT, HCTIbrTyeMBIC HaTbL, OKaHYHBaroutHecs 4HClaMH 57, 37, 17. OzHH HCTIbrryeMbit HeCKO/IbKO pa3 nozpal nogrophi npo ce6x 3TH HaTBI, CTapaxC5 KaK MOKHO Jiyyine 3anoMHHTb HX Bo3pacTOM OTLLa, 37-c TOZIOM CMepTH A. C . IlyuIKHHa (1837) 17-c rozoM OKTRÓp5CKO?peBoritounh (1917).
- The author of the phrase: "Happiness is like health: when you don't notice it, it means it exists" is: Choose one answer About I. S. Turgenev A. S. Pushkin Lev Yashin V. I. Lenin
- 3aòanue 1. Iloobepu nooxooauce nonamue k Dannomy onpeoenenuio. 1. Honoxerric zerami, Koropo pa3Mepax zeram 370 - a) BHII criepenH B) BHI CHeBa 6) BHI CBepxy r) rnaBHbIY BHII 2. H3o6paxenue o6sexta Ha TUTOCKOCTH 3TQ - a) npoekHua B) 3CKH3 6) BHA r) TEXHHYeCKNỦ pHCYHOK 3. IInaBHbii nepexozonHon JIHHHH B Apyryto 3TO - a) H3rH6 B) Ayra 6) cKpyrieHHe r) conpaxeHHe 4. 3aMKHYTaq yacTb Inpocrpancisa, orpanryennas TIOCKHMH HIH KPHBBIMH HOBepXHOCTRMH 3TO- a B) Herallb 6) reoMerpryeckoe reno r) Monemb 5. H306paxeme nerant BblnozHeHHOe no ripaBH/aN OT pyKH H B Macurrabe 3T0 - a) 4eprẽx B) 3CKH3 6) BHL CBepxy r) TexHHYeCKH# pHCYHOK
- Getting penicillin in Russia in 1942 belongs to: E.I. Martsenovsky L. V.Gromashevsky Z.V. Yermolyeva D.K. Zabolotny
Помощь с домашним заданием по истории
История – предмет, который одним интересен, а другим скучен. В то время как некоторые студенты в восторге от различных событий, сражений и ярких личностей прошлого, другим очень трудно запомнить хронологию сражений, имена влиятельных лидеров и обширную информацию, которую предлагает предмет.
К счастью, благодаря этим вопросам и ответам по истории вам легко вспомнить некоторые важные события и точное время, когда они произошли. Не волнуйтесь слишком сильно, даже если от имен этих ключевых людей у вас закружится голова. В нашей справке по домашним заданиям по истории есть функция ассоциации искусственного интеллекта, которая свяжет их с некоторыми интересными историями, чтобы помочь вам лучше их запомнить.