Abody moves on a circular path of radius 1 m it complete one circle in2 second. find it speed.

1/2 second

Explanation:

since body is moving in a circular path circumference will be displacement of the body 2πr=2*3.14*1=6.28m and time taken is 2 seconds therefore speed=d/t ,v=6.28/2=3.14m/s

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all matter is made up of atoms, are in turn made up of protons, neutrons and electrons.

in a solid, particles are packed tightly together so don't move much. the electrons of each atom are constantly in motion, so the atoms have a small vibration, but are fixed in their position. because of , particles in a solid have very low kinetic energy.

solids have a definite shape, as well as mass and volume, and do not conform to the shape of the container in are placed. solids also have a density, meaning that the particles are tightly packed together.  

in a liquid, the particles are more loosely packed than in a solid and are able to flow around each other, giving the liquid an indefinite shape. therefore, the liquid will conform to the shape of its container.

much like solids, liquids (most of have a lower density than solids) are incredibly difficult to compress.  

in a gas, the particles have a great deal of space between them and have kinetic energy. a gas has no definite shape or volume. if unconfined, the particles of a gas will spread out indefinitely; if confined, the gas will expand to fill its container. when a gas is put under pressure by reducing the volume of the container, the space between particles is reduced and the gas is compressed.