A student used cubes of agar jelly containing universal indicator, which changes colour at different pH. Five different sizes of cubes were cut from a larger block using a scalpel. • Cubes were placed in a beaker containing hydrochloric acid (enough to cover the cubes) and a stopwatch was started, • After 2 minutes the cubes were removed, rinsed with distilled water and blotted dry. • Acid absorbed at the outside continued diffusing towards the centre of the blocks. • The time taken for the blocks to turn entirely red was recorded. The results are shown in Table 22.1 on the insert. Length of one side of Surface Time taken to turn red (min) Cube area to agar cube volume Test 1 Test 2 Test 3 Mean (mm) ratio 1.20 6.4 2.9 5.4 4.9 10 0.60 14.8 15.5 14.6 15.0 20 0.30 30.6 28.3 27.4 28.8 D 30 0.20 44.1 42.2 43.0 43.1 40 0.15 58.7 60.1 57.4 58.7 Table 22.1 Whhal was Iie role ul the universal iridicalur in this expetiment?
A student used cubes of agar jelly containing universal indicator, which changes colour at different pH. Five different sizes of cubes were cut from a larger block using a scalpel. • Cubes were placed in a beaker containing hydrochloric acid (enough to cover the cubes) and a stopwatch was started, • After 2 minutes the cubes were removed, rinsed with distilled water and blotted dry. • Acid absorbed at the outside continued diffusing towards the centre of the blocks. • The time taken for the blocks to turn entirely red was recorded. The results are shown in Table 22.1 on the insert. Length of one side of Surface Time taken to turn red (min) Cube area to agar cube volume Test 1 Test 2 Test 3 Mean (mm) ratio 1.20 6.4 2.9 5.4 4.9 10 0.60 14.8 15.5 14.6 15.0 20 0.30 30.6 28.3 27.4 28.8 D 30 0.20 44.1 42.2 43.0 43.1 40 0.15 58.7 60.1 57.4 58.7 Table 22.1 Whhal was Iie role ul the universal iridicalur in this expetiment?
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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