The First Year of ScienceSanborn, 1914 - 484 σελίδες |
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Σελίδα vi
... usually been designated by names rather than by letters . Exercises are given at the end of each chapter and also in the body of each chapter except the first . The exercises are questions taken from the chapter ; they en- courage the ...
... usually been designated by names rather than by letters . Exercises are given at the end of each chapter and also in the body of each chapter except the first . The exercises are questions taken from the chapter ; they en- courage the ...
Σελίδα vii
... usually far more stimulating to the pupil than even the best of ready- made equipment . Only by linking our science with everyday things can we hope to convince the pupil that science is only common sense applied to daily life . The ...
... usually far more stimulating to the pupil than even the best of ready- made equipment . Only by linking our science with everyday things can we hope to convince the pupil that science is only common sense applied to daily life . The ...
Σελίδα 65
... usually breaks , while a thin glass flask does not . Why ? 3. Why do telephone wires sag in summer and become taut in winter ? 4. Alcohol boils at 78 ° C .; what temperature is this on the Fahren- heit scale ? The room temperature is 70 ...
... usually breaks , while a thin glass flask does not . Why ? 3. Why do telephone wires sag in summer and become taut in winter ? 4. Alcohol boils at 78 ° C .; what temperature is this on the Fahren- heit scale ? The room temperature is 70 ...
Σελίδα 66
... Usually a solid forms crystals ( cf. § 95 ) . When solids are melted , their temperature does not rise during the melting ; but the heat added is used up in overcoming cohesion . Thus , when ice at 0 ° C. is brought into a room at the ...
... Usually a solid forms crystals ( cf. § 95 ) . When solids are melted , their temperature does not rise during the melting ; but the heat added is used up in overcoming cohesion . Thus , when ice at 0 ° C. is brought into a room at the ...
Σελίδα 73
... usually expand when heated , and con- tract when cooled . This is explained by the theory that matter is composed of molecules , and that heating separates them further , while cooling causes them to come closer together . Thermometers ...
... usually expand when heated , and con- tract when cooled . This is explained by the theory that matter is composed of molecules , and that heating separates them further , while cooling causes them to come closer together . Thermometers ...
Άλλες εκδόσεις - Προβολή όλων
Συχνά εμφανιζόμενοι όροι και φράσεις
acid alcohol ammonia animals bacteria becomes blood body boiling bones bottle burning calcium called capillary carbon dioxide carpels carried cells center of mass cerebrum changed chloride chlorophyll clothing coal cold color compounds consists contains cooled copper cord corpuscles cotyledons cubic dermis digestion diphtheria disease disinfectants dissolved earth electric epidermis esophagus fibers flame force freezing gases germs give glands glass gram heat hence hydrochloric acid hydrogen inches intestine iron juice kerosene layer light lime limestone liquid lungs magnet material melted mercury mercury oxide metal milk molecules motion mouth muscles nerve nitrogen object organs oxide oxygen pharynx phosphorus plants potassium pressure produce proteids rays removed rock salt seed skin small intestine soap sodium soil solid soluble solution steam stem stomach stove substances sugar sulphur sulphur dioxide surface temperature tissue tube vapor vessel weather weight wind wire wood
Δημοφιλή αποσπάσματα
Σελίδα 459 - Measures of Length 10 millimeters (mm) =1 centimeter cm 10 centimeters =1 decimeter dm 10 decimeters =1 meter m 10 meters =1 dekameter Dm 10 dekameters =1 hektometer Hm 10 hektometers =1 kilometer Km...
Σελίδα 459 - Measures of Weight 10 milligrams (mg) =1 centigram eg 10 centigrams =1 decigram dg 10 decigrams =1 gram g 10 grams =1 dekagram Dg 10 dekagrams =1 hektogram Hg 10 hektograms =1 kilogram Kg...
Σελίδα 459 - ... decimeter =1 liter (1.) 10 liters =1 dekaliter (dl.). 10 dekaliters =1 hectoliter (hi.). 10 hectoliters =1 kiloliter (kl.). 4. Weight. The gram is the weight of 1 cc water at 4° C.
Σελίδα 40 - ... hung up at one end, which when long enough will at last break with its own weight. Torricelli, however, in 1643, made an experiment which gave the true explanation of the pump-maker's difficulty. Filling with mercury a glass tube three feet in length, and closed at one end but open at the other ; he closed the open end with his finger, and inverted the tube in a basin filled with mercury. The mercury then sank in the tube to a given level, whilst above this level there was an empty space, which...
Σελίδα 471 - The major planets are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto.
Σελίδα 396 - The nervous system is divided into two major categories: the central nervous system, consisting of the brain and spinal cord, and the peripheral nervous system, which is composed of all nerves that extend outward from the brain or spinal cord (Fig.
Σελίδα 467 - The Handbook of Chemistry and Physics, published by the Chemical Rubber Company, Cleveland, Ohio, contains tables of various properties of the elements.
Σελίδα 9 - LINEAR MEASURE 10 millimeters (mm.) = 1 centimeter 10 centimeters (cm.) — 1 decimeter 10 decimeters...
Σελίδα 60 - Fig. 25. noticeably for an increase in temperature and the amount of its expansion can be very readily determined. The ordinary thermometer consists of a glass tube of uniform bore which has a bulb at one end. The bulb and part of the tube are filled with mercury. The remaining part of the tube is empty, so that the mercury can freely rise or fall. When the temperature rises, the mercury expands and rises, when the temperature falls, the mercury contracts and sinks.
Σελίδα 11 - Tho symbol (Ib.) for it is equally general, and is derived from the Latin word libra. The old English pound, which is said to have been the standard of weight from the time of William the conqueror till that of Henry VII., was derived from the weight of 7,680 grains of wheat, all taken from the middle of the ear, and well dried.