Physics Class 10 Chapter 18 Numericals Pdf | Federal Board | National Book Foundation |
Download 10th class physics chapter 18 exercise solved numericals notes pdf , national book foundation, federal board. Unit 18: Radioactivity Exercise Numericals Problems: For solution please check pdf given at the end. 1. A radioactive substance has a half-life of eight months. In how much time, three-fourths of the substance will decay? 2. In 420 … Read more