Spring scale

You purchased 5 oz of gold in Quito, Ecuador (g = 977.110 cm/s2), for 400/oz. You then took the gold and the same spring scale on which you weighed it in Quito to Reykjavik Iceland (G = 983.06 cm/s2), where you weighed it again and sold it for 400/oz. How much money did you make or lose, or did you break even ... 

Record the reading on the spring scale at the breaking point. 

A group of engineers has landed on the moon, and would like to determine the mass of several unusual rocks. They have a spring scale calibrated to read pounds moss at a location where the... 

C A person weighs himself on a waterproof spring scale placed at the bottom of a 1-m-deep swimming pool. Will the per.son weigh more or less in water Why ... 

Weighing scales, such as spring scales, are sometimes used to measure force rather than mass or weight. 

By far, the largest segment of metrology deals with the design, production, and calibration of the various products and devices used to perform measurements. These devices range from the simplest spring scale or pan balance to some of the most sophisticated and specialized scientific instruments ever developed. In early times, measurements were restricted to those of mass, distance, and time because these were the foremost quantities used in trade. The remaining fundamental properties of electric current, amount of a substance, temperature, and luminous intensity either remained unknown or were not of consequence. 

FIGURE 18.6 Force transducers (a) spring scale, (b) gyroscope, (c) load cell. 

Mass is measured on instruments such as a balance, and weight is typically measured on a spring scale. Taking weight measurements involves reading the amount that an object pulls down on a spring. As the... 

Federzugwaage/Federwaage spring balance, spring scales... 

A chunk of coal is weighed twice while suspended from a spring scale (see Figure 1-10). When the coal is suspended in air, the scale registers 156 g when the coal is suspended underwater at 20 °C, the scale registers 59 g. What is the density of the coal The density of water at 20 °C is 0.9982 g cm. ... 

A body of mass m = 10 kg is resting on spring scales in an elevator. The elevator moves with an acceleration of a = 2 m/sec. Determine the readings of the spring scales in two cases when the elevator s acceleration is directed vertically upwards and then vertically downwards (Figure El.lO). 

A block is suspended to spring scales. A cord is crossed over the block. Masses m = 1.5 kg and m2 = 3 kg are attached to the ends of the cord. Find the scale readings at which the weights will move. Ignore block mass, the cord and the friction in the block. 

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