Half-Life 4
| First | First | Last | Quiz Score Total | Question 4 | 4) Calculate the time required for this to fall to 15 counts per second? | Show Your Workings: | Quiz Percentage Grade |
|---|---|---|---|---|---|---|---|
| ppefmh | Ed | Garstin | 0/1 | The alpha-emitter used in smoke detectors has a half-life of 432 years. If the initial count rate is 120 counts per second. |
| sv | 0% |
| First | First | Last | Quiz Score Total | Question 4 | 4) Calculate the time required for this to fall to 15 counts per second? | Show Your Workings: | Quiz Percentage Grade |
