A crow-bar of length 2.0 m is used as a machine to lift a box of 100 kgf by placing a fulcrum at a
distance of 0.1 m from the box. Calculate the effort
required.
[5.26 kgf)
[Hints : Effort arm = 2.0 m - 0.1 m = 1.9 m)

.) the observation by semmelweis that more mothers died of childbed fever when their doctors also worked in the morgue

the chart show the masses and velocities of two colliding objects that stick together after a collision.

according to the law of conservation of momentum, the momentum of the object after the collision is  

answer

1,500

kg • m/s.

the answer is f1 and d2 because if you put equal force on those two points the beam would balance trust me on this

as we know our atmosphere or air have different levels. every level has other gasses, and every gas has another permeability. when the light comes from lower permeability to higher permeability, it changes its direction. so that means that when the light comes from the moon to the earth, it changes it's direction many more times. it basically means that the shape of the light part of the moon is changed on the earth.

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