The author uses the example of the flameless candle to illustrate that 1. engineering maks products safer, 2. elements of nature are easy to replicate 3. there are many elements within a system, 4. products of engineering often become household objects

An air conditioning system consist of a 5 cm diameter pipe, operating at a pressure of 200 kpa. the air initially enters the pipe at 15°c with a velocity of 20 m/s and relative humidity of 80%. if the heat supply throughout the process is 960 w, determine the relative humidity and the temperature at the outlet

Journeyman training is usually related (clo2) a)-to specific tasks b)-to cost analysis of maintenance task c)-to control process to ensure quality d)-to installation of machinery

What is the heat treatment of metals? what is the benefit of it? why and how it's useful? answer in details, do not write by hand.