A “small gross” may sound peculiar in the world of measurements, yet it holds a significant niche in the realm of counting. A small gross equals 120 units, serving as a fascinating intermediate between a dozen and a gross. This unit reflects the duodecimal system’s influence, a base-12 number system used historically in trade and counting, particularly before the widespread adoption of the decimal system. While its usage is rarer today, it was once quite practical for merchandise packaging and bulk items, highlighting humanity’s penchant for diverse mathematical solutions in different eras. Rediscovering units like the small gross bridges the gap between historical trade practices and modern numerical systems, shedding light on how societies have quantified goods across centuries.
The “couple” is an intriguing unit that measures torque, essentially describing a pair of equal and opposite forces acting on a body in parallel planes. Despite its relatively obscure use in modern contexts compared to units like the newton-meter, the concept of a couple is fundamental in engineering and physics. It is vital in the analysis of systems that require rotational movements, such as gears, engines, and propeller shafts, highlighting the unit’s significance in various mechanical and structural applications.
Interestingly, what’s unique about a couple is that its effectiveness is independent of the point of rotation. This property allows engineers to simplify complex systems, focusing purely on the magnitude and direction of rotation rather than the specific pivot point, making their calculations both practical and efficient.
| Small Gross | Couples |
|---|---|
0
sm-gr
|
0
cp
|
0.5
sm-gr
|
30
cp
|
1
sm-gr
|
60
cp
|
1.5
sm-gr
|
90
cp
|
2
sm-gr
|
120
cp
|
2.5
sm-gr
|
150
cp
|
3
sm-gr
|
180
cp
|
3.5
sm-gr
|
210
cp
|
4
sm-gr
|
240
cp
|
4.5
sm-gr
|
270
cp
|
5
sm-gr
|
300
cp
|
5.5
sm-gr
|
330
cp
|
6
sm-gr
|
360
cp
|
6.5
sm-gr
|
390
cp
|
7
sm-gr
|
420
cp
|
7.5
sm-gr
|
450
cp
|
8
sm-gr
|
480
cp
|
8.5
sm-gr
|
510
cp
|
9
sm-gr
|
540
cp
|
9.5
sm-gr
|
570
cp
|
10
sm-gr
|
600
cp
|
10.5
sm-gr
|
630
cp
|
11
sm-gr
|
660
cp
|
11.5
sm-gr
|
690
cp
|
12
sm-gr
|
720
cp
|
12.5
sm-gr
|
750
cp
|
13
sm-gr
|
780
cp
|
13.5
sm-gr
|
810
cp
|
14
sm-gr
|
840
cp
|
14.5
sm-gr
|
870
cp
|
15
sm-gr
|
900
cp
|
15.5
sm-gr
|
930
cp
|
16
sm-gr
|
960
cp
|
16.5
sm-gr
|
990
cp
|
17
sm-gr
|
1020
cp
|
17.5
sm-gr
|
1050
cp
|
18
sm-gr
|
1080
cp
|
18.5
sm-gr
|
1110
cp
|
19
sm-gr
|
1140
cp
|
19.5
sm-gr
|
1170
cp
|
20
sm-gr
|
1200
cp
|
20.5
sm-gr
|
1230
cp
|
21
sm-gr
|
1260
cp
|
21.5
sm-gr
|
1290
cp
|
22
sm-gr
|
1320
cp
|
22.5
sm-gr
|
1350
cp
|
23
sm-gr
|
1380
cp
|
23.5
sm-gr
|
1410
cp
|
24
sm-gr
|
1440
cp
|
24.5
sm-gr
|
1470
cp
|
25
sm-gr
|
1500
cp
|
25.5
sm-gr
|
1530
cp
|
26
sm-gr
|
1560
cp
|
26.5
sm-gr
|
1590
cp
|
27
sm-gr
|
1620
cp
|
27.5
sm-gr
|
1650
cp
|
28
sm-gr
|
1680
cp
|
28.5
sm-gr
|
1710
cp
|
29
sm-gr
|
1740
cp
|
29.5
sm-gr
|
1770
cp
|
30
sm-gr
|
1800
cp
|
30.5
sm-gr
|
1830
cp
|
31
sm-gr
|
1860
cp
|
31.5
sm-gr
|
1890
cp
|
32
sm-gr
|
1920
cp
|
32.5
sm-gr
|
1950
cp
|
33
sm-gr
|
1980
cp
|
33.5
sm-gr
|
2010
cp
|
34
sm-gr
|
2040
cp
|
34.5
sm-gr
|
2070
cp
|
35
sm-gr
|
2100
cp
|
35.5
sm-gr
|
2130
cp
|
36
sm-gr
|
2160
cp
|
36.5
sm-gr
|
2190
cp
|
37
sm-gr
|
2220
cp
|
37.5
sm-gr
|
2250
cp
|
38
sm-gr
|
2280
cp
|
38.5
sm-gr
|
2310
cp
|
39
sm-gr
|
2340
cp
|
39.5
sm-gr
|
2370
cp
|
40
sm-gr
|
2400
cp
|
40.5
sm-gr
|
2430
cp
|
41
sm-gr
|
2460
cp
|
41.5
sm-gr
|
2490
cp
|
42
sm-gr
|
2520
cp
|
42.5
sm-gr
|
2550
cp
|
43
sm-gr
|
2580
cp
|
43.5
sm-gr
|
2610
cp
|
44
sm-gr
|
2640
cp
|
44.5
sm-gr
|
2670
cp
|
45
sm-gr
|
2700
cp
|
45.5
sm-gr
|
2730
cp
|
46
sm-gr
|
2760
cp
|
46.5
sm-gr
|
2790
cp
|
47
sm-gr
|
2820
cp
|
47.5
sm-gr
|
2850
cp
|
48
sm-gr
|
2880
cp
|
48.5
sm-gr
|
2910
cp
|
49
sm-gr
|
2940
cp
|
49.5
sm-gr
|
2970
cp
|
50
sm-gr
|
3000
cp
|
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