Francium-233 has a half-life of 22 minutes. A Geigor counter gives a reading of 58 counts per minute (cpm) from a sample of francium-233.What will the reading be 22 minutes later?You can ignore background radiation

The reading of the Geiger counter, 22 minutes later = 29 counts per minute (cpm)

Explanation:

Half life is defined as the time taken for the amount ( or activity) of a substance to reduce to half its original value.

As stated in the question, the half life of Francium-233 is 22 minutes, . This means that it takes 22 minutes for the activity of Francium-233 to reduce to half of its original value.

The original activity of Francium-233 =  58 counts per minute (cpm)

By the end of 22 minutes, the activity measured by the counter would have halved.

Activity of Francium-233 after 22 minutes = 58/2

Activity of Francium-233 after 22 minutes = 29 counts per minute (cpm)

answer: option c. i.e. electric current flowing “downhill” from the negative electrode to the positive electrode in a battery

explanation:

the water analogy to the circuits define the pipes (water flows) to the electric current. now, we know that the electric current flows from the positive terminal to the circuit (as shown in the diagram attached).

hence, option c is the correct answer.

good for her? ? where is the question?