21At what temperature are the Celsius and Fahrenheit readings equal?A0B40C100D−40View AnswerDiscussWorkspaceReportSaveEasy
22Carat is a unit used to measure the:APurity of gold or mass of gemsBSpeed of shipsCVolume of milkDLength of clothView AnswerDiscussWorkspaceReportSaveEasy
24One nautical mile is approximately:A1,852 metresB1,000 metresC1,609 metresD2,000 metresView AnswerDiscussWorkspaceReportSaveEasy
25The SI unit of pressure is the:APascalBAtmosphereCBarDNewtonView AnswerDiscussWorkspaceReportSaveEasy