Question

The normal maximum pressure exerted by a human heart is 120 mm Hg. Calculate the normal maximum pressure exerted in atm and torr. Round each of your answers to 3 significant digits. X 5 ? son

Answer 1

He know that - I atm=760 mm Hg We have 120 mm Hg. 1 atm = 0.15789 Olun unting it into atm'> 120 mm Hg x 760 mm Hg ~ 0.158 ata conue and

• We know that - - 1 tonn = We have 120 mm Hg. 1 mm Hg. Conventing pressure from mm Hg to torr : 120 mm Hg *tammetra = 120 tonn. Aus

Significans Figures: We know a numben is consist of digits. And significant figunes are those digits of a number which are meaningful in terms of accuracy. But all digits are not significant figures. There are Some route : Significant figures ane - 1) All non zeno digit iil. 1,2,3,4 e.tic. 2) Leading Zenos are not significant figures. Like - 0059 ; Here the two leading zenos are not significant figure. Here only 5&6 are significant figures. 3) Zenos between non zero digits are significant figure. Like - 309 ; 500 7 significant significant figure figure.

4) Trailing Zenos are also not significant figures but When there decimal point present then the trailing Zenos are significant figures. Like - 13500s, nof significant figures. 4920. 37 - significant figures 683.92 og la significant figures. 3970.0 Both are significant figure