![A sample of radioactive substance has radioactive nuclei 14 × 10^5 .Its half - life is 20sec. How many nuclei will remain after 20 seconds? A sample of radioactive substance has radioactive nuclei 14 × 10^5 .Its half - life is 20sec. How many nuclei will remain after 20 seconds?](https://dwes9vv9u0550.cloudfront.net/images/3651092/4c7f832f-8ff6-4069-b7fd-b78a3ef5bda9.jpg)
A sample of radioactive substance has radioactive nuclei 14 × 10^5 .Its half - life is 20sec. How many nuclei will remain after 20 seconds?
REGOLAMENTO DEL CONCORSO A PREMI DENOMINATO "VIVI L'ESCLUSIVA LIVE EXPERIENCE AL RED VALLEY FESTIVAL CON RADIO 105"
![Mining review . 27 ANALYSIS OF CORE SAMPLES FROM MAIN SEAM, No. 6 BORE, LEKiH CREEK COALFIELD. Analysis of S.mples, Air Dried. Number of Sample. 1 2 3 I 4 ! 5 Mining review . 27 ANALYSIS OF CORE SAMPLES FROM MAIN SEAM, No. 6 BORE, LEKiH CREEK COALFIELD. Analysis of S.mples, Air Dried. Number of Sample. 1 2 3 I 4 ! 5](https://c8.alamy.com/comp/2AJF28D/mining-review-27-analysis-of-core-samples-from-main-seam-no-6-bore-lekih-creek-coalfield-analysis-of-smples-air-dried-number-of-sample-1-2-3-i-4-!-5-i-6-!-7-j-8-i-9-i-10-i-11-j-12-1-13-1-t-i-15-i-16-17-i-18-i-19-20-21-depth-from-moisture-volatile-fixed-surface-1-at-matter-carbon-ash-sulphur-in-feet-105-c-711-712-1806-31-51-32-50-17-93-0-21-712-713-14-64-25-51-31-93-27-92-015-713-714-15-76-25-91-33-83-24-50-013-714-715-14-86-26-89-32-45-25-80-0-14-715-716-22-64-34-44-37-65-5-27-0-13-716-717-17-68-27-33-42-57-12-42-010-717-718-13-32-22-89-34-54-29-25-0-04-718-719-1611-34-42-2AJF28D.jpg)
Mining review . 27 ANALYSIS OF CORE SAMPLES FROM MAIN SEAM, No. 6 BORE, LEKiH CREEK COALFIELD. Analysis of S.mples, Air Dried. Number of Sample. 1 2 3 I 4 ! 5
![AUDIO ARCADE on Twitter: "This Friday at 7pm producers and gamers link up like they do every month at @LoadingBar come join in! SF6 set ups throughout the venue! Open Beat sets! AUDIO ARCADE on Twitter: "This Friday at 7pm producers and gamers link up like they do every month at @LoadingBar come join in! SF6 set ups throughout the venue! Open Beat sets!](https://pbs.twimg.com/ext_tw_video_thumb/1665787811323052032/pu/img/28lIG6NqlM-kB8oI.jpg:large)