Junior ScienceB.H. Sanborn, 1921 - 533 σελίδες |
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Αποτελέσματα 1 - 5 από τα 49.
Σελίδα xiii
... wires covered ? - Exercises and summary . CHAPTER XXV 243 How Man Uses Electricity - What is an electromagnet ? How do we ring an electric bell ? How can a telegraph wire carry a message ? How can a current silverplate a spoon ? — How ...
... wires covered ? - Exercises and summary . CHAPTER XXV 243 How Man Uses Electricity - What is an electromagnet ? How do we ring an electric bell ? How can a telegraph wire carry a message ? How can a current silverplate a spoon ? — How ...
Σελίδα 7
... wire before it breaks ; or we pass light through a piece of thick glass , to find out how the light will be changed . The ex- periments with the geranium , the pig , the sugar , the brass wire , and the light are really questions put to ...
... wire before it breaks ; or we pass light through a piece of thick glass , to find out how the light will be changed . The ex- periments with the geranium , the pig , the sugar , the brass wire , and the light are really questions put to ...
Σελίδα 30
... wire to the cork , so that the candle may be held upright in the bottle . We can also carry out the experiment with burning sulphur held in a long - handled spoon ( combustion spoon ) . The handle is put through the cork . After burning ...
... wire to the cork , so that the candle may be held upright in the bottle . We can also carry out the experiment with burning sulphur held in a long - handled spoon ( combustion spoon ) . The handle is put through the cork . After burning ...
Σελίδα 31
... wire and covered with a disk of " tin . " The lower end of the strip or wire is put through a hole or a narrow slit in a piece of sheet lead or into a rubber stopper , so that the phosphorus holder will stand upright . A floating ...
... wire and covered with a disk of " tin . " The lower end of the strip or wire is put through a hole or a narrow slit in a piece of sheet lead or into a rubber stopper , so that the phosphorus holder will stand upright . A floating ...
Σελίδα 38
... wire burns in oxygen with a brilliant light and a shower of tiny sparks . ously than in air . If we blow out the flame , and put the glowing splinter into the bottle , the glow becomes very intense and the splinter bursts into a flame ...
... wire burns in oxygen with a brilliant light and a shower of tiny sparks . ously than in air . If we blow out the flame , and put the glowing splinter into the bottle , the glow becomes very intense and the splinter bursts into a flame ...
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Άλλες εκδόσεις - Προβολή όλων
Συχνά εμφανιζόμενοι όροι και φράσεις
acid ammonia animals bacteria becomes blood body boiling bones bottle breathing bulb burning called candle carbon dioxide carry cause cells cerebrum changed cloth coal cold color cool copper covered digestive dish dry cell earth electric current epidermis evaporate feet fire flame force give glass grow heat hydrochloric acid hydrogen inside iron kerosene kerosene lamp lamp layers learned light rays limewater liquid lungs machine magnet manganese dioxide material melted metal milk moon mouth move muscles needle nerve nitrogen nonconductor object oxide oxygen pass phosphorus piece pipes plants pole potassium chlorate pounds pressure produce pull pump push rock rubbed sal ammoniac salt seeds skin soil solution starch steam stomata stove substances sugar sulphur sunlight surface temperature tissue trees tube vibrations warm weather weight wind wire wood yeast zinc
Δημοφιλή αποσπάσματα
Σελίδα 509 - 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 402 - THIS is the forest primeval. The murmuring pines and the hemlocks, Bearded with moss, and in garments green, indistinct in the twilight, Stand like Druids of old, with voices sad and prophetic, Stand like harpers hoar, with beards that rest on their bosoms...
Σελίδα 509 - 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 509 - Area. 100 square millimeters (sq. mm.) =1 sq. centimeter (sq. cm.). 100 square centimeters = 1 sq. decimeter (sq. dm.). 100 square decimeters =1 sq. meter (sq. m.). 3. Cubic Measure, or Volume. The unit of volume is the liter, which is 1 cu. dm., or 1,000 cc 1,000 cubic millimeters (cu. mm.) = 1 cubic centimeter (cc). 1,000 cubic centimeters =1 cubic decimeter (cu. dm.). 1 cubic decimeter = 1 liter (1.). 10 liters =1 dekaliter (dl.). 10 dekaliters =1 hectoliter (hl.). 10 hectoliters = 1 kiloliter...
Σελίδα 105 - The known principal planets, in order of their distance from the Sun are: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto.
Σελίδα 339 - Levers are divided into three classes: in the first class, the fulcrum ' is between the power and the weight ; in the second class, the fulcrum is...
Σελίδα 86 - The wind arrows show the wind to be moving in a direction opposite to the movement of the hands of a watch (counterclockwise) when it is laid, face up, on the map.
Σελίδα 243 - ... north pole of one magnet will attract the south pole of another, and the south pole of one will attract the north of another ; but the north...
Σελίδα 53 - The oxygen is carried by the blood to all parts of the body...
Σελίδα 331 - In the second class of levers th'e fulcrum is at one end and the power at the other, with the weight between them.