At certain time, the activity of three radioactive materials are in the ratio of 3 : 4 : 5 . What will be the mark ratio of their activities at any further date?

Three samples of a radioactive substance have activity in a ratio 2 : 5 : 7 , then after two half lives the ratio of their activities will be:

Three samples of a radioactive substance have activity in a ratio 2 : 5 : 7 , then after two half lives the ratio of their activities will be:

The speeds of three cars are in the ratio 4: 3: 2. What is the ratio between the times taken by the cars to cover the same distance ?

The speeds of three cars are in the ratio 2:3 : 4. What is the ratio between the times taken by these cars to travel the same distance?

The speeds of three cars are in the ratio 5 : 4 : 6. The ratio between the time taken by them to travel the same distance is____

The ratio of molecular mass of two radioactive substances is 3/2 and the ratio of their decay constant is 4/3 . Then find the ratio of their initial activity per mole

The ratio of molecular mass of two radioactive substances is 3//2 and the ratio of their decay cosntatnt is 4//3 . Then. The ratio of their initial activity per mole will be