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.
Chemical processes slowly. dissolve metal, causing plumbing pipes, fixtures. and water-using equipment to deteriorate and fail. Corrosion can cause three types of damage: â¢ The entire metal surface gradually thins and. red stains appear in iron or steel plumbing. systems or blue-green stains in copper and. brass plumbing systems (Fig.