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...C. A newer method of making cores is to bind the core by passing CO2 through it. A wide range of productivity is obtainable from machine mouldings using apparatus such as hand-operated “jolt-squeeze” to massive industrial plant. Plant and tooling costs are always high. Chemically bonded sands (sodium silicate/CO2 process) produce hard moulds with good dimensional...

...C/2023 A3 (Tsuchinshan-ATLAS) photographed during October 2024 on the western horizon]Figure 1 Comet C/2023 A3 (Tsuchinshan-ATLAS) photographed in October 2024 on the western horizonShow descriptionComet C/2023 A3 (Tsuchinshan-ATLAS) photographed in October 2024 on the western horizon shows a bright nucleus with a faint straight tail behind. The comet was visible just...

...the device must operate when the water reaches a temperature within the range 97 °C to 100 °C. Much of this information again comes from the user, and it is surprising how flexible and arbitrary many of these numbers can be. For instance, thermometers for the control of domestic ovens could be specified with an accuracy of ±0.1 °C of reading, and I daresay you'll find someone who'll install ......

...C) Cu-2%Be moulds coated with graphite every 50 castings. Mould life is exceptionally good. Fe-5%Cr hot work steel forging dies are coated with graphite before each forging and pre-heated to 250˚C using cartridge heaters. Die life in excess of 300,000 forgings. Medium to high production rates of 180–250 components h-1. Typical products include spider cranks for...

...c) Wall units (of full room height) come in sections 1 m wide and 0.3 m deep. How many units can be fitted round the walls of the lounge without blocking the windows or door? Draw a larger scale plan of the lounge to show how these wall units can be arranged. (d) Is the bathroom big enough for a 1.8 m by 0.8 m bath? Now click on 'Reveal answer' for a more detailed...