Junior ScienceB.H. Sanborn, 1921 - 533 σελίδες |
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Αποτελέσματα 1 - 5 από τα 72.
Σελίδα 17
... cold water over а second flask of air , the air contracts in volume . Since the outside air cannot get into the flask , water is forced up instead . Think of some cases you have seen in which air expands and contracts . 13. Can Air Be ...
... cold water over а second flask of air , the air contracts in volume . Since the outside air cannot get into the flask , water is forced up instead . Think of some cases you have seen in which air expands and contracts . 13. Can Air Be ...
Σελίδα 20
... cold , outer air into a warm room , what will happen to it ? Why ? ( 6 6. Set an empty " glass , mouth down , into a saucer or basin of hot water ; what happens , and why ? Have you ever noticed any phenomenon like this in the rinsing ...
... cold , outer air into a warm room , what will happen to it ? Why ? ( 6 6. Set an empty " glass , mouth down , into a saucer or basin of hot water ; what happens , and why ? Have you ever noticed any phenomenon like this in the rinsing ...
Σελίδα 37
... cold water from the water pan is forced into the hot tube , the tube may break . We shall want to use the bottles of oxygen in the next section and in Chapter VI . FIG . 22 . When hydrogen peroxide solu- tion is added to manganese ...
... cold water from the water pan is forced into the hot tube , the tube may break . We shall want to use the bottles of oxygen in the next section and in Chapter VI . FIG . 22 . When hydrogen peroxide solu- tion is added to manganese ...
Σελίδα 54
... colds and other troubles of the nose , throat , and lungs almost as soon as cold weather comes and their houses are ... cold . " It has been calculated that in one hour a healthy man makes about 4000 cubic feet of air unfit to breathe ...
... colds and other troubles of the nose , throat , and lungs almost as soon as cold weather comes and their houses are ... cold . " It has been calculated that in one hour a healthy man makes about 4000 cubic feet of air unfit to breathe ...
Σελίδα 55
... cold one and hold a lighted match near the top of the door- way . You will find that the match flame is blown from the warm room toward the cooler one . Now hold the match near the bottom of the doorway ; the match flame is blown from ...
... cold one and hold a lighted match near the top of the door- way . You will find that the match flame is blown from the warm room toward the cooler one . Now hold the match near the bottom of the doorway ; the match flame is blown from ...
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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.