A. a bicycle chain is an example of a compound machine
The instrument is a Geiger counter and is used to measure radioactive level around people's bodies.
They may be changed because they may find evidence of some thing that will change their perspective on things.
Given:
The magnitude of each charge is q1 = q2 = 1 C
The distance between them is r = 1 m
To find the force when distance is doubled.
Explanation:
The new distance is

The force can be calculated by the formula

Here, k is the constant whose value is

On substituting the values, the force will be

The answer is A. They are both processes in which water is changed into water vapor.