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2. Microwave oven - Wikipedia

   en.wikipedia.org/wiki/Microwave_oven

   The size of household microwave ovens can vary, but usually have an internal volume of around 20 liters (1,200 cu in; 0.71 cu ft), and external dimensions of approximately 45–60 cm (1 ft 6 in – 2 ft 0 in) wide, 35–40 cm (1 ft 2 in – 1 ft 4 in) deep and 25–35 cm (9.8 in – 1 ft 1.8 in) tall. [29]

3. Microwave - Wikipedia

   en.wikipedia.org/wiki/Microwave

   A microwave oven passes microwave radiation at a frequency near 2.45 GHz (12 cm) through food, causing dielectric heating primarily by absorption of the energy in water. Microwave ovens became common kitchen appliances in Western countries in the late 1970s, following the development of less expensive cavity magnetrons. Water in the liquid ...

4. Knife sharpening - Wikipedia

   en.wikipedia.org/wiki/Knife_sharpening

   For example, a butcher steel is a round file with the teeth running the long way, while a packer steel (used in the meat packer's industry) is a smooth, polished steel rod designed for straightening the turned edge of a knife, [10] and is also useful for burnishing a newly finished edge. Because steels have a small diameter they exert high ...

5. Fusion power - Wikipedia

   en.wikipedia.org/wiki/Fusion_power

   The same constraints prevent runaway reactions. Although the plasma is expected to have a volume of 1,000 m 3 (35,000 cu ft) or more, the plasma typically contains only a few grams of fuel. [121] By comparison, a fission reactor is typically loaded with enough fuel for months or years, and no additional fuel is necessary to continue the reaction.