AP and TS EAMCET Engineering 2020 Model Paper 1

Question : 111 of 160

Marks: +1, -0

Acertain radioactive element disintegrates with a decay constant of 7.9×10−10∕sec. At agiven instant of time, if the activity of the sample is equal to 55.3×1011 disintegration sec, then number of nuclei at that instant of time