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

An accident occurs in a laboratory in which a large amount of a radioactive material, having a half life of 20 days, becomes embeded in the foor and walls so that the level of adiation is 32 times the permissible level. The laboratory can be safely occupied after

An accident in a nuclear laboratory resulted in depostion 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 safe operation of the laboratory. What is the minimum number of days after which the laboratory can be considered safe for use?

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

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.

Radioactive elements is spread over a room, its half life is 30 day, Its activity is 50 times the permissible value. After how many days will it be safe?

The half-life of a radioactive substance is 10 days. The time taken for the ((7)/(8)) th of the sample of disintegrates is

Initial amount of the radioactive element with half life 10 days is 16 g. What amount in gm of this element will remain after 40 days?