A freshly prepared radioactive source of half life 2 hours emits radiation of intensity which is 64 times the permissible safe level. The minimum time(in hours) after which it would be possible to work safely with this source is:

A freshly prepared radioactive source of half-life 2 h emits radiation of intensity which is 64 times the permissible safe level. The minimum time after which it would be possible to work safely with this source is

A freshly prepared radioactive source of half-life 2 h emits radiation of intensity which is 64 times the permissible safe level. The minimum time after which it would be possible to work safely with this source is

A freshly prepared radioactive source of half-life 2 h emits radiation of intensity which is 64 times the permissible safe level. The minimum time after which it would be possible to work safely with this source is

A freshly prepared radioactive source of half-life 2 h emits radiation of intensity which is 64 times the permissible safe level. The minimum time after which it would be possible to work safely with this source is

A radioactive element (t_(1//2) = 50 days) is spread over a room. Its activity is 30 times the permisisble value for safe working. Calculate the number of days after which the room will be available for safe working.

As accident in a nuclear laboratory resulting in deposition of a certain amount of radioactive material of half life 18 days inside the laboratory Tests revealed that the radiation was 64 times more than the permissible level required for save operation of the laboratory what is the minimum number of days after which the laboratory can be considered safe for use?

Some amount of a radioactive substance (half-life =10 days ) is spread inside a room and consequently the level of radiation become 50 times the permissible level for normal occupancy of the room. After how many days will the room be safe for occupation?.

Some amount of a radioactice substance (half-life =10 days ) is spread inside a room and consequently the level of radiation become 50 times the permissible level for normal occupancy of the room. After how many days will the room be safe for occupation?.

A radioactive sample is emitting 64 times radiations than non hazardous limit. if its half life is 2 hours, after what time it becomes non-hazardous:

A and B are two radioactive substances whose half lives are 1 and 2 years respectively. Initially 10 gm of A and 1 gm of B is taken. The time (approximate) after which they will have same quantity remaining is.