Answer:
They have no freedom to move
Explanation:
Particles can be solids, liquids and gases.
Solids are the substances in which the atoms are very close to each other. It is very difficult to separate the molecules. The atoms cannot move from one place to another. The inter molecular forces between them is very strong.
Hence, the correct option that describes the movement of atoms in a solid is (c) "They have no freedom to move".
Answer:
Helium
Explanation:
Helium is the least reactive element, since it is a noble gas with the smallest amount of valence rings.
<span>C. gravity = air resistance</span>
Answer:
Explanation:
The thermal resistances in this case act as series resistances, so to get the total resistance you need to add al resitances:
To get the contact resistence per unit length we have to multiply the contact resistance by the perimeter of the contact area:
For the conductive resistance on the sheath:
Convective resistance:
The perimeter of the auter surfice is:
Total Resistance:
Heat transfer: