Physics
Force of impact is the force

By the objects weight
None of these
By the speed of the object
When the objects meet

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Physics
Inside an aeroplane, flying at a high altitude,

normal atmospheric pressure is maintained by the use of air pumps.
the pressure is the same as that outside.
the pressure inside is less than the pressure outside.
normal humidity and partial vacuum are maintained.

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Physics
The mass defect is the result of what action occurring?

Energy being converted into moles of atoms when neutrons break apart protons
Protons and electrons being attracted to each other
Mass being converted to energy when protons and neutrons break apart in a nucleus
Mass being converted to energy when protons and neutrons bind together in a nucleus

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