An accident in a laboratory results in a room being contaminated by a radioisotope with a half-life of 2 days. If the radiation is measured to be eight times the maximum permissible level, how much time must elapse before the room is safe to enter?

6 days

Explanation:

We are given that

Half life,

We have to find the time must elapse before the room is safe to enter.

Let maximum permissible level=

Radiation,

Let n be the number of half cycle

Time must elapse before the room is safe to enter=

adding a(n) to an electric circuit would increase the magnetic field around a wire;

b. solenoid

a solenoid is a type of electromagnet whose purpose is to generate a controlled magnetic field.

if the purpose of the solenoid is instead to impede changes in the electric current, a solenoid can be more specifically classified as an inductor rather than an electromagnet.