The most common way to measure specific impulse today uses seconds. This is used both in the SI (metric system) world as well as where English units are used. This way the units are identical everywhere. This means specific impulse can be used to compare engine performance in any country. Most companies that make rocket motors or jet engines use seconds to advertise their product’s performance.
ð ə WORD_BOUNDARY m oʊ s t WORD_BOUNDARY k ɑ m ə n WORD_BOUNDARY w eɪ WORD_BOUNDARY t ə WORD_BOUNDARY m ɛ ʒ ə ɹ WORD_BOUNDARY s p ə s ɪ f ɪ k WORD_BOUNDARY ɪ m p ʌ l s WORD_BOUNDARY t ə d eɪ WORD_BOUNDARY j uː s ɪ z WORD_BOUNDARY s ɛ k ə n d z WORD_BOUNDARY ð ɪ s WORD_BOUNDARY ɪ z WORD_BOUNDARY j uː z d WORD_BOUNDARY b oʊ θ WORD_BOUNDARY ɪ n ð ə WORD_BOUNDARY s iː WORD_BOUNDARY m ɛ t ɹ ɪ k WORD_BOUNDARY s ɪ s t ə m WORD_BOUNDARY w ɜː l d WORD_BOUNDARY æ z WORD_BOUNDARY w ɛ l WORD_BOUNDARY æ z WORD_BOUNDARY w ɛ ɹ WORD_BOUNDARY ɪ ŋ ɡ l ɪ ʃ WORD_BOUNDARY j uː n ɪ t s WORD_BOUNDARY ɑ ɹ WORD_BOUNDARY j uː z d WORD_BOUNDARY ð ɪ s WORD_BOUNDARY w eɪ WORD_BOUNDARY ð ə WORD_BOUNDARY j uː n ɪ t s WORD_BOUNDARY ɑ ɹ WORD_BOUNDARY aɪ d ɛ n t ɪ k ə l WORD_BOUNDARY ɛ v ɹ ɪ w ɛ ɹ WORD_BOUNDARY ð ɪ s WORD_BOUNDARY m iː n z WORD_BOUNDARY s p ə s ɪ f ɪ k WORD_BOUNDARY ɪ m p ʌ l s WORD_BOUNDARY k æ n WORD_BOUNDARY b iː WORD_BOUNDARY j uː z d WORD_BOUNDARY t ə WORD_BOUNDARY k ə m p ɛ ɹ WORD_BOUNDARY ɛ n d̠ʒ ɪ n WORD_BOUNDARY p ə ɹ f ɔ ɹ m ə n s WORD_BOUNDARY ɪ n WORD_BOUNDARY ɛ n i WORD_BOUNDARY k ʌ n t ɹ i WORD_BOUNDARY m oʊ s t WORD_BOUNDARY k ʌ m p ə n i z WORD_BOUNDARY ð æ t WORD_BOUNDARY m eɪ k WORD_BOUNDARY ɹ ɑ k ɪ t WORD_BOUNDARY m oʊ t ə ɹ z WORD_BOUNDARY ɔ ɹ WORD_BOUNDARY d̠ʒ ɛ t WORD_BOUNDARY ɛ n d̠ʒ ɪ n z WORD_BOUNDARY j uː s WORD_BOUNDARY s ɛ k ə n d z WORD_BOUNDARY t ʊ WORD_BOUNDARY æ d v ə ɹ t aɪ z WORD_BOUNDARY ð ɛ ɹ WORD_BOUNDARY p ɹ ɑ d ʌ k t s WORD_BOUNDARY p ə ɹ f ɔ ɹ m ə n s WORD_BOUNDARY