Weight and Volume

The determination of the mass or weight of a body is one of the most fimdamental of physical measurements, and it is 

After a balance has been placed in position and levelled, it should be tested with regard to its adjustment and its 

The first requirement which a balance must satisfy is that it shall be consistent with itself i.e. successive determinations of the weight of an object must be in agreement. From the closeness of agreement between the diflFerent weighings, the accuracy of the balance can be judged. 

On the other hand, suppose that the following turning points were observed, the readings to the right being called positive and those to the left negative— 

— To find the position of rest, take the mean of the two readings on the one side, and divide the algebraic sum of this mean and the reading on the opposite side of the middle line by 2 the result gives the scale division corresponding with the resting point, and the sign (+ or —) indicates on which side of the middle line the zero lies. 

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Weight and volume net heating values of commercial motor fuels (average values). 

Based on ovendry weight and volume at 12% moisture content. 

Use of the peUetted converter, developed and used by General Motors starting in 1975, has declined since 1980. The advantage of the peUetted converter, which consists of a packed bed of small spherical beads about 3 mm in diameter, is that the pellets were less cosdy to manufacture than the monolithic honeycomb. Disadvantages were the peUetted converter had 2 to 3 times more weight and volume, took longer to heat up, and was more susceptible to attrition and loss of catalyst in use. The monolithic honeycomb can be mounted in any orientation, whereas the peUetted converter had to be downflow. AdditionaUy, the pressure drop of the monolithic honeycomb is one-half to one-quarter that of a similar function peUetted converter. 

Because of the relative cost, use Sorbeads as the desiccant and design on the basis of 6% loading. Sorbeads weigh approximately 49 Ib/ft (bulk density). The required weight and volume of desiccant per bed would be ... 

Hydrogen onboard storage systems for vehicles are bulkier, heavier, and costlier than those for liquid fuels or compressed natural gas, but are less bulky and less hca than presently envisaged electric batteries. Even with these constraints, it appears that hydrogen could be stored at acceptable cost, weight, and volume for vehicle applications. This is true because hydrogen can be used so efficiently that relatively little fuel is needed onboard to travel a long distance. 

The microsol scale technique is used to weigh a shale sample out of and in water, thus giving weight and volume. The results are plotted versus depth. Low shale densities (high porosity filled with water) indicate overpressured zone. A demonstration example is shown in Figure 4-336. 

Battery types are either lead-acid or nickel-cadmium cells. Lead-acid types have been used for a long time and, when correctly maintained, have a working life of 25 years. Nickel-cadmium batteries offer the same working life as lead-acid but are smaller in weight and volume, generally with a higher initial capital cost. Loads applied to D.C. systems can be categorized into three types ... 

The density of a substance is its weight per unit of volume. The unit of volume in the English system of measurement is 1 cubic foot or 1 f. To find the density of a substance, you must know its weight and volume. You then divide its weight by its volume to find the weight per unit volume. 

Of course, a plant designer must anticipate the weights and volumes of the constituents at each stage of the process. Hence, he must be able to answer such a question as, What weight of sulfur will burn to produce 100,000 liters of pure SO2 at 500°C and one atmosphere pressure ... 

To summarize, we find that the weight and volume relations that are observed in chemical changes provide an experimental foundation for the atomic theory. All of contemporary chemical thought is based upon the atomic model and, hence, every successful chemical interpretation strengthens our belief in the usefulness of this theory. 

In practical cases, however, the excess weight and volume due to the use of alloys may not be very far from those required with pure lithium electrodes, for one generally has to operate with a large amount of excess lithium in rechargeable cells in order to make up for the capacity loss related to the filament growth problem upon cycling. 

E. Procedure. The procedure section should unambiguously describe the stepwise preparation of samples, standards, and blanks. Instrumental variables should be described. Weight and volume measurements should include the acceptable range. The procedure should also include methods for any calculations. Procedures should include, but are not limited to, the following recommended elements ... 

There are many ways to determine the weights and volumes to use in an application to a residue field trial. If calculated correctly, all of these methods are adequate. No... 

Protocols to determine exposure scenarios should require that application be made using normal practices. Test substance application must be thoroughly documented by researchers. Documentation should include weights and volumes of materials added to... 

The designers of the lecture room were, of course, proved correct. Only a few years later a systematic order was, indeed, recognized. An extraordinary double discovery was made in 1869. The German chemist Julius Lothar Meyer (1830-1895) noticed a remarkable periodicity during his rigorous scientific analysis of the atomic weights and volumes. He remained content with only a mild curiosity in this realization, as his interests lay primarily in physicochemical problems. He was objective and driven only by facts he was wary of hypotheses... 

The characteristics of a carbon material used as active reagent of the negative electrode (anode) of a Lithium-Ion cell considerably influence the power characteristics of the cell as a whole. Thus, the major parameters are the values of specific capacity per unit weight and volume, and also the... 

Storing of hydrogen in liquid form at cryogenic condition is attractive in that it offers low weight and volume per unit energy when compared to compressed hydrogen. 

Hydrogen Storage System Capacity Weight and Volume.331... 

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