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8 October, 22:38

In which way of the following situations would a spring scale be used?

A) a study of the effect of different fertilizers on plant growth

B) an investigation of the efficiency of different simple machines

C) a measurement of the effect of a catalyst in a chemical reaction

D) a comparison of the patterns of light created by a different prisms

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  1. 8 October, 22:40
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    The correct answer is (B) : a spring scale can be used in an investigation of the efficiency of different simple machines A spring scale is used to measure weight (force) of a load. When determining efficiency of a machine, we must know energy used to perform a certain work or activity and for us to do that we have to know the amount of effort or energy required or used in that situation, since, a spring balance can measure weight (force), then it can be very handy in the process of measuring the efficiency of a simple machine. The other choices (A), (C), and (D), in those situations, the spring balance cannot be of any use.
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