ðə nˈɑːzəl ʌv hˈɑːt wˈɔːɾɚ ɹˈɑːkɪts mˈʌst biː ˈeɪbəl tə wɪðstˈænd hˈaɪ pɹˈɛʃɚ, hˈaɪ tˈɛmpɹɪtʃɚz ænd ðə pɚtˈɪkjʊlɚli kɚɹˈoʊsɪv nˈeɪtʃɚɹ ʌv hˈɑːt wˈɔːɾɚ.
The nozzle of hot water rockets must be able to withstand high pressure, high temperatures and the particularly corrosive nature of hot water.