The middle or centre of the Earth is the core. However the middle of the layers from the surface to the centre of the Earth is known as mantle.
True. Think of a magnet and how they only connect to the opposite charges.
Answer:
A. a material burns out when current is excessive
The answer is C. Potential energy is when an object is at rest.
Kinetic is when an object is in motion.
O2 refers to two oxygen atoms bonded together, while 2 O refers to two oxygen atoms that are not bonded to each other. They both have two oxygen atoms, but in O2, the oxygen atoms are bonded, while in 2O, the atoms are not.
