Junior Science, Τόμος 1B.H. Sanborn, 1920 |
Αναζήτηση στο βιβλίο
Αποτελέσματα 1 - 5 από τα 39.
Σελίδα iii
... pressure , convection , and the like ; they soon learn to use all sorts of mechanical and electrical devices : but they experience these phenomena and use these devices empirically , without the clarifying influence of scientific ex ...
... pressure , convection , and the like ; they soon learn to use all sorts of mechanical and electrical devices : but they experience these phenomena and use these devices empirically , without the clarifying influence of scientific ex ...
Σελίδα vii
... pressure ? phere's pressure be measured ? atmosphere's pressure always the same ? - Exercises . Can the atmos- — The barometer . Is the - Fire CHAPTER IV What does fire mean to us ? - How are fires started ? How does a fire burn ...
... pressure ? phere's pressure be measured ? atmosphere's pressure always the same ? - Exercises . Can the atmos- — The barometer . Is the - Fire CHAPTER IV What does fire mean to us ? - How are fires started ? How does a fire burn ...
Σελίδα 17
... pressure of the water in the jar . occupy a smaller pressure upon it . space if we increase the Thus , a popgun is a tube having one end closed by a cork and the other end closed by a piston . As we force the piston into the tube , we ...
... pressure of the water in the jar . occupy a smaller pressure upon it . space if we increase the Thus , a popgun is a tube having one end closed by a cork and the other end closed by a piston . As we force the piston into the tube , we ...
Σελίδα 18
... pressure , we decrease the volume of a gas . If we begin with a certain volume Air Mercury FIG . 9. The air in the closed arm of the tube is compressed by the weight of the mer- cury in the longer arm . of air in the closed , shorter ...
... pressure , we decrease the volume of a gas . If we begin with a certain volume Air Mercury FIG . 9. The air in the closed arm of the tube is compressed by the weight of the mer- cury in the longer arm . of air in the closed , shorter ...
Σελίδα 19
... pressure that it keeps the water from rushing in and furnishes fresh air for the diver . The air is kept flowing , so that it bubbles out around the edge of the bell . A caisson is a diving bell which men use in placing the foundations ...
... pressure that it keeps the water from rushing in and furnishes fresh air for the diver . The air is kept flowing , so that it bubbles out around the edge of the bell . A caisson is a diving bell which men use in placing the foundations ...
Άλλες εκδόσεις - Προβολή όλων
Συχνά εμφανιζόμενοι όροι και φράσεις
acid ammonia animals bacteria baking baking powder baking soda becomes body boiling water bottle breathing bubbles burning called candle Carbohydrates carbon dioxide cause charcoal cloth clouds coal cold compressed constellation contains cooking cooled copper covered cubic dew point dish dough earth evaporate fire flame flask force formed freezing fruit furnace glass gravity heat hydrochloric acid hydrogen iron kerosene lakes layers learned light limestone limewater liquid lungs manganese dioxide match means meat melting mercury metal miles milk minerals moon move nitrogen nonconductor oxide oxygen phosphorus piece pipes piston plants potassium chlorate pounds powder pressure pump push rain rise rock salt soap soda soil solution splinter spores starch stars steam stone stopper stove substances sugar sulphur surface temperature test tube thermometer vegetables ventilation warm washing weather weight wind wood yeast zinc