Junior ScienceB.H. Sanborn, 1921 - 533 σελίδες |
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Αποτελέσματα 1 - 5 από τα 47.
Σελίδα 16
... feet long , 20 feet wide , and 10 feet high . The volume , in cubic feet , will be 24X20X10 , or 4800 cubic feet . Since 1 cubic foot of air weighs about 1 ounces , the air of the room must weigh about 4800 × 11 , or 6000 ounces . To ...
... feet long , 20 feet wide , and 10 feet high . The volume , in cubic feet , will be 24X20X10 , or 4800 cubic feet . Since 1 cubic foot of air weighs about 1 ounces , the air of the room must weigh about 4800 × 11 , or 6000 ounces . To ...
Σελίδα 22
... feet long and that your lungs were strong enough , could you , by suction , raise a liquid , such as water or lemonade , up to your mouth ? Your lungs are not strong enough , but you could use a suc- tion , or lift , pump for the ...
... feet long and that your lungs were strong enough , could you , by suction , raise a liquid , such as water or lemonade , up to your mouth ? Your lungs are not strong enough , but you could use a suc- tion , or lift , pump for the ...
Σελίδα 23
... feet high . This would be about 30 inches . 18. The Barometer . To test his guess , Torricelli used a straight glass tube about 3 feet long ( Fig . 13 ) and closed at one end . He filled the tube entirely with mercury , closed the open ...
... feet high . This would be about 30 inches . 18. The Barometer . To test his guess , Torricelli used a straight glass tube about 3 feet long ( Fig . 13 ) and closed at one end . He filled the tube entirely with mercury , closed the open ...
Σελίδα 25
... feet we ascend above sea level ; what would its height be at an elevation of 1800 feet ? Of 4500 feet ? - 20. Exercises . - 1. If your body has an area of 2000 square inches and the atmosphere's pressure upon it is 15 pounds for every ...
... feet we ascend above sea level ; what would its height be at an elevation of 1800 feet ? Of 4500 feet ? - 20. Exercises . - 1. If your body has an area of 2000 square inches and the atmosphere's pressure upon it is 15 pounds for every ...
Σελίδα 53
... feet of air in a day . How much of this is oxygen ? Why , " you will ask , " do we need to take in so much oxygen ? " The answer is that we need oxygen to oxidize the food we eat . The digested food , like the oxygen , is carried by the ...
... feet of air in a day . How much of this is oxygen ? Why , " you will ask , " do we need to take in so much oxygen ? " The answer is that we need oxygen to oxidize the food we eat . The digested food , like the oxygen , is carried by the ...
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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.