The two headlights of a car are wired: 1.in series with each ...

[drink]

The two headlights of a car are wired:
  1.in series with each other.
  2.in parallel.
  3.neither in series or in parallel.
  4.It is impossible to tell.

Question 2

Why aren't the three readings for background radiation in Procedure 1 identical?

[shaquita]

Answer to Question 1

2

Answer to Question 2

Background radiation comes from cosmic rays and local radioactive sources in a
random way, and a time of 1 minute is too brief to obtain identical readings but these
variations will average out over longer times.

[drink]

Great answer, keep it coming

[scottmt]

Thanks for the timely response, appreciate it