Prob. 2.3-3. a wire is used to hang a lantern over a pool. neglect the weight of the wire, and assume that it is taut, but strain free, before the lantern is hung. when the lantern is hung, it causes a 50-mm sag

Explanation:

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https://www.transtutors.com/questions/a-wire-is-used-to-hang-a-lantern-over-a-pool-neglect-the-weight-of-the-wire-and-assu-1994907.htm

strain is defined as = extension/  original length

extension  = 50mm =m

original length = 6m

so,

strain = /6

=

strain is a dimensionless unit

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-the first industrial use of geothermal energy began near pisa, italy in late 18th century

-in 1904, italian scientist piero ginori conti invented the first geothermal electric power plant in which steam was used to generate the power

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hope this