It's C.
All chemical reactions will always need activation energy.
Answer:The volume of the stacks is the total space occupied by the disks
Explanation:
It is because all these three elements contain ionic properties and they have only one element in their outermost shell
This type of organism is called an autotroph.They are organisms capable of self-nourishment by using inorganic materials as a source of nutrients and using photosynthesis or chemosynthesis as a source of energy
When you drop a ball, it is dropped DOWNWARDS so the number is represented by a negative number. If you toss the ball up it will be a positive number.
To answer your question:
When an object is dropped downwards there will be a negative number since the object is falling downwards.
