Answer: Gravitational forces are action-at-a-distance forces
Explanation:
Gravitational forces are action-at-a-distance forces that act between two objects even when they are held some distance apart. For example If you watch a roller coaster car move along its course, then you are witnessing an action-at-a-distance.
Answer: He could be using batteries or it is rechargeable
Minerals are composed mainly of "elements". Elements are mainly the basic building blocks of nearly everything around us.
Minerals are defined as substances that are found naturally in Earth.
Minerals have definite structures and compositions.
Currently, there are over 3000 known minerals.
Answer:
A. The object is placed at focal point on the principal axis.
This where no image is formed.
Explanation:
This is because the position of the object is at infinity.So the position of the image will be At the focus where the size of the image will be highly diminished, point-sized.
The nature of the image will be Real and Inverted.
Due to these reasons no image if formed when object is placed on the principal axis.
It brings a civilized government to backward countries.
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