Answer:
3=8908-=698=49=304=+74950=405=0381=01=20
55555%
Explanation:
Answer:
D
Explanation:
If the atom is neutral, the sum of the core and valence electrons is the same as the number of protons, which is the atomic number of the element. So if the sum of the core and valence electrons in a neutral atom equals 25 , that is the number of protons in the atomic nucleus, and the atomic number of the element.
Answer: A force must cause an object to move along the same direction as the force.
Explanation:
Work is defined as displacement in the position of an object due to action of force. Mathematically the work done is a product of force and displacement of an object. The direction of the force applied and direction in which object is displaced is always same.
When work is done,a force must cause an object to move along the same direction as the force.
Explanation:
As we known that atoms in a liquid substance are closer to each other and they are able to slide past each other because the attractive forces between them are neither too strong or too weak.
Hence, liquid substance are able to take the shape of a vessel in which they are placed. Liquids have a fixed volume but no fixed shape.
On the other hand, atoms of a solid do not have enough kinetic energy. As they are held by strong attractive forces and they only vibrate at their mean position.
Hence, solids have fixed shape and volume.
Thus, we can conclude that in the given situation liquid to solid change of state is taking place.
Answer:
- To dissolve a solid, for example, adding sugar to water agitating until it completely dissolves.
- To promote heat transference.
- To blend two miscible liquids such as water and alcohol.
- To disperse a solid in a liquid to form a suspension.
I hope you find these examples useful! good luck!
