A radioactive element gets spilled over the floor of a room. Its half life period is 30 days. If the initial activity is ten times the permissibel value, after how many days will it be safe to enter the room?

A radioactive element gets spilled over the floor of a room. Its half life period is 30 days. If its initial activity is ten times the permissible value, after how many days will it be safe to enter the room?

A radioactive element gets spilled over the floor of a room, Its half-life period is 30 days. If the initial activity is 10 times the permissible value, after how many days will it be safe to enter the room ?

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?

An accident in a laboratory deposits some amount of radioactive material of half-life 20d on the floor and the walls. Testing reveals that the level of radiation is 32 times the maximum permissible level. After how many days will it be safe to use the room?

A radioactive element has half-life period of 30 days. How much of it will be left after 90 days?

A radioactive element has half-life period of 30 days. How much of it will be left after 90 days?

A radioactive element has half life period of 30 days. How much of it will be left after 90 days?

A radioactive element has half-life period of 30 days. How much of it will be left after 90 days?

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.