Elements of General Science: Laboratory ProblemsGinn, 1920 - 188 σελίδες |
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Σελίδα iv
... records which are to be made . Note- books have often been made too burdensome with endless and sometimes meaningless note writing , whereas brief notes with correct diagrams are better . Occasionally a more extended written report is ...
... records which are to be made . Note- books have often been made too burdensome with endless and sometimes meaningless note writing , whereas brief notes with correct diagrams are better . Occasionally a more extended written report is ...
Σελίδα 10
... record the weight . 4. Pump air from the bottle until it seems probable that no more will be removed . Close the clamp next to the pump and watch the mercury gauge to see if the connections leak . Vaseline may often be used to advantage ...
... record the weight . 4. Pump air from the bottle until it seems probable that no more will be removed . Close the clamp next to the pump and watch the mercury gauge to see if the connections leak . Vaseline may often be used to advantage ...
Σελίδα 26
... Record the temperature in the table below . Record the temperatures of the warm water and hot water . Record the temperature of the room and that obtained by placing the thermometer under the tongue . Questions . Describe the sensation ...
... Record the temperature in the table below . Record the temperatures of the warm water and hot water . Record the temperature of the room and that obtained by placing the thermometer under the tongue . Questions . Describe the sensation ...
Σελίδα 29
... record in the table below . Put some ice in the water and stir slowly , noting the outside of the can closely for any change . Note the temperature of the water the instant this change appears . Be careful not to break. [ 29 ] PROBLEM 11 ...
... record in the table below . Put some ice in the water and stir slowly , noting the outside of the can closely for any change . Note the temperature of the water the instant this change appears . Be careful not to break. [ 29 ] PROBLEM 11 ...
Σελίδα 30
... Record all the data in the table below and make the calculations suggested . Refer to page 24 of the text for suggestions . Questions . What was the room temperature ? At what temper- ature did the moisture appear ? Why is it best to ...
... Record all the data in the table below and make the calculations suggested . Refer to page 24 of the text for suggestions . Questions . What was the room temperature ? At what temper- ature did the moisture appear ? Why is it best to ...
Άλλες εκδόσεις - Προβολή όλων
Elements of General Science: Laboratory Problems Otis William Caldwell Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2016 |
Elements of General Science: Laboratory Problems (Classic Reprint) Otis W. Caldwell Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2015 |
Συχνά εμφανιζόμενοι όροι και φράσεις
acid alcohol apparatus as shown Assemble the apparatus average barometer beaker boiling bulb Bunsen burner burette burette clamp candle carbon dioxide chlorophyll color corn cross-section paper cubic centimeters determine diagram dry cells dry soil eggs electric experiment Fehling's solutions filter paper flame flask funnel given glass plate glass plug glass tube grams heat hydrochloric acid hydrogen iodine jet tube lamp leaf limewater magnet materials mercury meter metric microscope moon motor Note number of grains observations Optional problems oxygen piece Place plants pulley pump pupils Questions Read sections Record Reference relative humidity remove Ring stand rubber tube sample scale secured seeds sewage shown in figure sodium sodium hydroxide sodium peroxide solution spring balance starch steam stopper to fit substances Suggestions for report temperature test tube test-tube thermometer toad typhoid water supply weather map weight wide-mouth bottles wire yeast
Δημοφιλή αποσπάσματα
Σελίδα 186 - 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 185 - 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 105 - The ratio W/P between the force exerted and the force applied is called the mechanical advantage of the machine. Newton described six elementary machines to which all others may be reduced. These are the lever, the pulley, the inclined plane, the wheel and axle, the wedge and the screw. These may be reduced to three, since the wheel and axle is but a modified lever, and the screw and the wedge are but modifications of the inclined plane. In all cases, however, the law of machines holds good, viz.,...
Σελίδα 33 - Each of the Weather Bureau stations is operated by one or more trained- observers, and is equipped with mercurial barometers, thermometers, wind vanes, rain and snow gauges, and anemometers, and many of them with sunshine recorders, barographs, thermographs, and other devices which make a continuous automatic record of the local weather conditions and changes. The results of the twice-daily observations are immediately telegraphed to the central...
Σελίδα 37 - Indies, and supplemented by daily reports from various other points in the northern hemisphere. Within two hours after the morning observations have been taken...
Σελίδα 9 - ... can not with impunity inhale a vitiated air and expect our lungs to select the pure and reject the impure without permanent injury to our breathing apparatus as well as to our whole body. Before passing to the subject of "Town air," I should like you to grasp and keep well before you the idea that we are living at the bottom of a great ocean of air, that we are surrounded on all sides by matter invisible because composed of minute particles (separated by spaces which are big in comparison with...
Σελίδα 37 - ... about 1600 principal distributing points, whence they are further disseminated by telegraph, telephone, wireless, and mail.
Σελίδα 38 - The center of a coil. counter-clockwise. In a direction opposite that in which the hands of a clock rotate.
Σελίδα 87 - Explain why there is a difference between the weight of the object in air and its weight in water.
Σελίδα 131 - Record also the diameter of the sun, the diameter of the moon, and the distance from the earth to the moon.