Answer:
Interchangeable is something that can be used in the same manner as something else without any important differences.
or in a more simple way
something that can be exchange
For example when two sweaters look almost the same and you could easily wear either one with a particular skirt, this is an example of when the sweaters can be worn interchangeably.
Answer:
B
Explanation:
nothing to do with black holes creating star or related
3 is the answer to your question
Answer: it depends on the mass of the pendulum or on the size of the arc through which it swings.
Explanation:
