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Answer:
1)Density is a measurement that compares the amount of matter an object has to its volume. An object with much matter in a certain volume has high density. An object with little matter in the same amount of volume has a low density. Density is found by dividing the mass of an object by its volume.
2)
a) Matter can exist in one of three main states: solid, liquid, or gas. Solid matter is composed of tightly packed particles. A solid will retain its shape; the particles are not free to move around. ... Gaseous matter is composed of particles packed so loosely that it has neither a defined shape nor a defined volume.
b)In physics, the kinetic energy of an object is the energy that it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity. Having gained this energy during its acceleration, the body maintains this kinetic energy unless its speed changes
3)
a)gas completely fills the vessel in which it is kept because there is negligible force of attraction between the particles of gas. Thus, the gas particles move freely in all directions. ... These collisions of the gas particles with the walls of the container exert pressure on the walls of the container
b)unit area on another substance. The pressure of a gas is the force that the gas exerts on the walls of its container. When you blow air into a balloon, the balloon expands because the pressure of air molecules is greater on the inside of the balloon than the outside.
c)A wooden table should be called a solid because it has a definite shape and volume, is rigid, does not flow, the particles are tightly bound with very less kinetic energy and, not diffuse and has negligible intermolecular spaces between its particles.
d)The particles of a gas are constantly moving in all the directions with different speeds. ... (d) In air, there is lot of empty space between the molecules and the forces between the particles are almost negligible. Hence, we can move our hand in air.
4) Liquids generally have lower density as compared to solids but ice floats on water. ... These spaces are larger as compared to spaces in water molecules. Thus the volume of ice is greater than water.
Explanation:
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