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...circulation pump, which pumps the mixed, but unreacted, ingredients into the reaction vessel). The gases enter the reaction vessel at the top and some of the nitrogen and hydrogen react to form ammonia as they pass over a catalyst within the reaction vessel (see Catalysts and converters ). The mixture leaving the reaction vessel at the bottom passes to the separator where...

...doubled, the area is increased by a factor of four. The factor of four comes about because the radius is multiplied by itself, and 2 × 2 = 4. The Earth’s radius is close to three times that of Mercury’s. Figure 14 shows how much larger the Earth’s cross-sectional area is than Mercury’s: it’s a bit less than 3 × 3 = 9 times the area. Count the squares overlying...

...doubles in going from a group of six to a group of eight. SAQ 3 From your study of Reading 2, make a list of the four or five factors that you regard as most significant in determining whether or not a group will function effectively. Answer The most important factors are: worthwhile, clear, and attainable group objectives. group size and composition: it should be neither...