Answer:
Electrons revolves around the nucleus in a fixed orbits with fixed energy.
electron clouds.
Explanation:
Rutherford in his model of atom explained:
- Maximum space inside the atom is empty.
- Electron revolves around the the center called nucleus.
- Nucleus contains the positive charge.
Bohr's in his model explained that:
- Electrons revolves around the nucleus in a fixed orbit named as shells.
- Each orbits or shells has fixed amount of energy and size.
Answer:
3.76 N
Explanation:
We are given that two force vectors point in opposite directions.
Let


Because second force act in opposite direction.
We have to find the magnitude of sum of two forces.
We know that triangle law of addition
Resultant sum=
Substitute the values then we get
Resultant sum of two forces=
Resultant sum of two forces=3.76 N
Hence, the magnitude of sum of two forces=3.76 N
The suns incoming rays are perpendicular to the Tropic of Capricorn
Physical change
Because it's changed by heat