Goodbye privacy, hello 'Alexa': Amazon Echo, the home robot who hears it all. We had Rory Carroll invite âAlexaâ aka the Echo into his home. There was helpful cooking assistance, endless facts and figures, an amusing misunderstanding â and concerns over what exactly Amazon does with all that interaction data. Rory Carroll in Los Angeles.
Aqua regia or Royal water can dissolve metals. It is a mixture of conc.nitric acid and conc.hcl in the ratio of 1:3. Remember none of the above mentioned acids will dissolve the metals in the absence of other. adhi Â· 9 years ago.
Metal food and beverage cans have a thin coating on the interior surface, which is essential to prevent corrosion of the can and contamination of food and beverages with dissolved metals (UK FSA, 2002). In addition, the coating helps to prevent canned foods from becoming tainted or spoiled by bacterial contamination.