A Manual of Practical Physics: For Students of Science and Engineering, Volume 1 |
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A Manual of Practical Physics, for Students of Science and Engineering Arthur Taber Jones,Ervin S 1868-1956 Ferry No preview available - 2016 |
Common terms and phrases
adjust angle apparatus approximation axis balance barometer body boiling point bubble bulb calorimeter center of mass coefficient column condensed constant coördinating correction cross hair curve cylinder denotes density determined difference disk distance divided elastic limit equal equation error glass grams hydrometer inertia jacket knife edges lamina length liquid M₁ M₂ MANIPULATION AND COMPUTATION manometer means measured mercury meter stick method micrometer screw moment of inertia moved OBJECT AND THEORY observed obtained optical lever pendulum perature placed pointer position pressure pyknometer quantity radiation radius reading roller rotation simple pendulum specific gravity specific heat specimen spherometer spirit level standard masses steam surface swings t₁ t₂ telescope tempera temperature THEORY OF EXPERIMENT thermometer thread tion torque tracing point tube ture vapor vernier vertical vessel volume water equivalent weight Whence wire Young's modulus zero point
Popular passages
Page 172 - F., the testings should commence. To this end insert the torch into the opening in the cover, passing it in at such an angle as to well clear the cover, and to a distance about half way between the oil and the cover. The motion should be steady and uniform, rapid and without any pause. This should be repeated at every two degrees...
Page 89 - The Specific Gravity or relative density of a substance is the ratio of its density to the density of some standard substance.
Page 172 - The appearance of a slight bluish flame shows that the flashing point has been reached. In every case note the temperature of the oil before introducing the torch. The flame of the torch must not come in contact with the oil. The water-bath should be filled with cold water for each separate test, and the oil from a previous test carefully wiped from the oil cup.
Page 172 - ... above. Care must be taken that the oil does not flow over the flange. Remove all air bubbles with a piece of dry paper. Place the glass cover on the oil cup, and so adjust the thermometer that its bulb shall be just covered by the oil. If an alcohol lamp is employed for heating the water-bath, the wick should be carefully trimmed and adjusted to a small flame.
Page 31 - ... eliminated with perfect certainty, is called the Probable Mean Result. Again, the physicist may wish to obtain the exact weight of a body. No balance is exactly poised so that the two arms are precisely equal. But their difference effects the result by a known law of mechanics. This law shows that by weighing the body first in one pan and then in the other, and taking the geometric mean of the two weights, we shall get the exact answer. Such a mean is the Precise Mean Result. The mean commonly...
Page 209 - The rate at which a body cools is proportional to the difference between the temperature of the body and that of the surrounding air. If a body in air at 25°C will cool from 100" to 75° in one minute, find its temperature at the end of three minutes.
Page 172 - If an alcohol lamp be employed for heating the water bath, the wick should be carefully trimmed and adjusted to a small flame. A small Bunsen burner may be used in place of the lamp. The rate of heating should be about two degrees per minute, and in no case exceed three degrees. " As a flash torch, a small gas jet one-quarter of an inch in length should be employed.
Page 207 - ... the muslin envelope is thoroughly moist. CHAPTER XIV CALORIMETRY CALOEIMETRY is the theory and art of measuring quantities of heat. Unfortunately there is no single quantity of heat that is universally adopted as the unit. A common unit in scientific work is the amount of heat required to raise the temperature of one gram of water from 15° C. to 16° C. This unit is called the 15° calorie or simply the calorie or the gram-degree-centigrade thermal unit. In the British system the unit adopted...
Page 172 - As a flash torch, a small gas jet one-quarter of an inch in length should be employed. When gas is not at hand employ a piece of waxed linen twine. The flame in this case, however, should be small. " When the temperature of the oil has reached 85° F.