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shiwani sharma Grade:
        

half life period of a radioactive element is 140 days. after 560 days 1 g of the element will reduce to ......

6 years ago

Answers : (3)

vikas askiitian expert
510 Points
										

A/Ao = (1/2)t/T     


A is final amount  , t is time , & T is half life ...


 


A = Ao(1/2)t/T


A = Ao(1/2)560/140


A = Ao(1/2)4 = (1/16)Ao


Ao = initial amount = 1g


A = 1/16gm = 0.0625gms


this is the amount of  element after 560 days

6 years ago
om harne
12 Points
										
A wave undergoes reflection from a rigid boundary. One of its characteristic parameters that changes is
(a) frequency
(b) phase
(c) velocity
(d) wavelength
2 years ago
sugandha
8 Points
										
phase
2 years ago
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