Examkin

Soru

Zorluk: OrtaExplicit Detail Retrieval

Passage:
In 1891, German amateur scientist Agnes Pockels published a landmark paper detailing her development of a rectangular slide trough designed to measure the surface tension of water. Operating without access to a formal laboratory, Pockels devised a mechanism featuring a movable strip of tin that traversed the surface of a water-filled tray, allowing her to systematically manipulate surface impurities. By measuring the force required to detach a small ring from the liquid surface at varying concentrations of oil, she demonstrated that surface tension remains largely constant until oil molecules form a contiguous monomolecular layer, after which tension drops precipitously. Lord Rayleigh, to whom Pockels had originally sent her observations in a letter written in German, facilitated the paper's publication after recognizing that her device provided a far more precise quantitative measurement of monolayer coverage than previous methods, which relied on static liquid drops.

According to the passage, Pockels evaluated the behavior of surface tension across different oil concentrations by measuring which of the following?

  1. The force required to detach a small ring from the liquid surfaceCevap
  2. B
    The rate at which oil molecules spread to form a contiguous monomolecular layer
  3. C
    The volume of static liquid drops required to saturate the water-filled tray
  4. D
    The resistance encountered by the tin strip as it moved across the water surface
  5. E
    The change in chemical composition of surface impurities upon contact with oil

Cevap

The correct option is the one stating that Pockels measured the force required to detach a small ring from the liquid surface.
The passage explicitly states that Pockels demonstrated the relationship between surface tension and monolayer coverage 'By measuring the force required to detach a small ring from the liquid surface at varying concentrations of oil.' This directly confirms the option identifying the force required to detach a small ring.

Adım Adım Çözüm

1
Identify the target keyword and concept in the question stem.
The stem asks how Pockels evaluated/measured surface tension across varying concentrations of oil.
Direct retrieval requires locating the specific sentence in the passage discussing her measurement procedure.
2
Locate the explicit statement in the passage.
The text states: 'By measuring the force required to detach a small ring from the liquid surface at varying concentrations of oil, she demonstrated that surface tension remains largely constant...'
This directly describes her exact quantitative measurement metric.
3
Match the explicit fact to the correct option.
The option specifying 'The force required to detach a small ring from the liquid surface' directly paraphrases the passage fact without adding unwarranted extrapolations.
Explicit detail retrieval relies on direct text verification.

Anahtar Kavram

Explicit Detail Retrieval
Bu soruyu puanla

Konular

Explicit Detail Retrieval

Bu konudan daha fazla soru