Junior ScienceB.H. Sanborn, 1921 - 533 σελίδες |
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Αποτελέσματα 1 - 5 από τα 30.
Σελίδα 21
... pipe tie tightly a piece of thin sheet rubber and then , by suction through the stem , remove some of the air . Explain what happens . Does this show anything of air pressure ? If your laboratory has an air pump , perform the same ...
... pipe tie tightly a piece of thin sheet rubber and then , by suction through the stem , remove some of the air . Explain what happens . Does this show anything of air pressure ? If your laboratory has an air pump , perform the same ...
Σελίδα 22
... pipe 10 , 20 , 30 , or 40 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 ...
... pipe 10 , 20 , 30 , or 40 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 ...
Σελίδα 25
... to day ? 7. Could you prove , by the use of a clay pipe with sheet rubber tied over the bowl , that the air presses in all directions ? Try it . CHAPTER IV FIRE · 21. What Does Fire Mean to PRESSURE OF THE ATMOSPHERE 25.
... to day ? 7. Could you prove , by the use of a clay pipe with sheet rubber tied over the bowl , that the air presses in all directions ? Try it . CHAPTER IV FIRE · 21. What Does Fire Mean to PRESSURE OF THE ATMOSPHERE 25.
Σελίδα 35
... pipe when there is a fire in the stove contains more , or less , oxygen than when it entered the front of the stove ? Why ? 4. If we wish to put out a fire , what must we keep away from it ? How can this be done ? 5. Is water a ...
... pipe when there is a fire in the stove contains more , or less , oxygen than when it entered the front of the stove ? Why ? 4. If we wish to put out a fire , what must we keep away from it ? How can this be done ? 5. Is water a ...
Σελίδα 62
... pipe to carry off the waste gases . In place of the andirons , there is a grate to hold the fuel up , so that air may pass through it . In a cookstove both the top of the stove and the oven must be heated , hence the stove has a " back ...
... pipe to carry off the waste gases . In place of the andirons , there is a grate to hold the fuel up , so that air may pass through it . In a cookstove both the top of the stove and the oven must be heated , hence the stove has a " back ...
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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.