Sharp EL-5250, EL-5230 Decay Normal, Original Mass, Mº=?, T= Years, Running the program, Result

Chapter 8: Application Examples

Program code	Key operations
T=-(ln(M≥©M≠))©	; T ; = S ( i
1.2118œ-4	( @ v 1 z @
	v 0 ) ) z 1.2118
	` S 4 e
Print T	i 0	; T e
Print”YEARS	i 1	@ a YEARS ;
	e
End	i 5 e

•The half-life of a radioactive isotope is the time required for half of its mass to decay.

Running the program

4.Press j to return to the PROG mode menu.

5.	Press 0, select the program
		DECAY :NORMAL
	‘DECAY’ and press e.
6.	Enter 100 for M0 and 50 for M1.	ORIGINAL MASS
		Mº=?

Result

The half-life of 14C is 5719.980034 years.

T= 5719.980034

YEARS

98