Question

10 M A. Fill in the blanks. 1. The CGS unit of density is _ 2. When the air cools its density _ 3. Turning moment caused by a couple is called a _ 4. The SI unit of pressure is _ 5. Pressure due to a liquid is _ of the area of cross section of containing vessel. 6. The empty space about mercury in a simple barometer is called _ vacuum 7. The perpendicular drawn at the point of incidence is called as_ 8. Image formed by a plane mirror is_ 9. A mirror is a part of hollow sphere. 10. A _ is called as a centre of hollow sphere. SM​

Answer 1

Answer:

Liquids and gases are considered to be fluids because they yield to shearing forces, whereas solids resist them. Like solids, the molecules in a liquid are bonded to neighboring molecules, but possess many fewer of these bonds. The molecules in a liquid are not locked in place and can move with respect to each other. The distance between molecules is similar to the distances in a solid, and so liquids have definite volumes, but the shape of a liquid changes, depending on the shape of its container. Gases are not bonded to neighboring atoms and can have large separations between molecules. Gases have neither specific shapes nor definite volumes, since their molecules move to fill the container in which they are held