Question

The decay constant of radioactive substance is 4.33 x 10 -⁴ per year. calculate it's half life period.......​

Answer 1

Answer:

hello student here is your answer

given - lambda = 4.33 x 10^-4 year –1

to find - half life period (T)

formula - T = 0.693 / lambda

calculation- from formula,

T = 0.693 /4.33 x 10 ^-4

final answer = 1600 years..

self answer......

Answer 2

Answer:

Generic PnP Monitor had somehow got disabled and was causing the issue. Here are the steps to fix it:

• Click on Start and search for Device Manager. Open it
• In the list of devices, locate Monitors and double click on it
• Right click on it and click on Enable
• That's it. Once I did this, I was able to change the brightness both using keys and from Mobility center.

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