## Friction is necessary evil, Physics

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why is friction a necessary evil?

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#### Define the interplanar spacing in miller indices, Define the interplanar sp...

Define the interplanar spacing in miller indices. Interplanar spacing d in a cubic lattice Interplanar spacing into a cubic crystal is specified by d = a/(√(h2 + k2 + l

#### Linear-shm, A particle executes linear some with an amplitude if 2 cm.when ...

A particle executes linear some with an amplitude if 2 cm.when the particle is at 1cm from the mean position the magnitude of its velocity is equal to that of its acceleration.Then

#### Reaction paper, scalar and vecror

scalar and vecror

#### Describe acceleration, Describe Acceleration In physics, acceleration i...

Describe Acceleration In physics, acceleration is the rate at that the velocity of a body changes with time. In common, velocity and acceleration are vector quantities, along w

#### Olbers paradox, Olbers' paradox (H. Olbers; 1826): If the Universe is ...

Olbers' paradox (H. Olbers; 1826): If the Universe is uniform, infinite & unchanging then the whole sky at night would be bright regarding as bright as the Sun. The further yo

#### The broken pencil-ray optics, The Broken Pencil-Ray Optics A general cl...

The Broken Pencil-Ray Optics A general classroom demonstration includes placing a pencil (or similar object) within an upright position within a round glass of water. The penci

#### Motion angular velocity, A scooterist is racing at a speed of 72 km per hou...

A scooterist is racing at a speed of 72 km per hour. If the radius of the wheel is 20 cm, find the angular speed of the wheels.   Ans) 72kmph=20m/s 20cm=0.2m; v=rw w=v/r w=20/0

#### Siphon, i have a siphon question

i have a siphon question  