Physics
The spring constant of a spring depends on its

Length and its diameter
Length only
Material only
Thickness, its diameter and its material

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Physics
Siphon will fail to work if:

Both its limbs are of unequal length.
The temperature of the liquids in the two vessels are the same.
The densities of the liquid in the two vessels are equal.
The level of the liquid in the two vessels are at the same height.

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Physics
Which statement best describes an igneous intrusion?

Magma is exported to an open area and forms iron
Magma is injected into surrounding rock forming an igneous intrusive
Igneous intrusion for when ice crystals splash into lava
Magma explodes to the surface and forms a smooth outer layer of rock

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