Physics
Second and third class levers are differentiated by

The presence of multiple loads
The location of the fulcrum
The location of the load
The type of fulcrum present

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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
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
Protons and electrons being attracted to each other

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Physics
It is easier to roll a stone up a sloping road than to lift it vertical upwards because

Work done in both is same but the rate of doing work is less in rolling.
Work done in rolling a stone is less than in lifting it.
Work done in lifting the stone is equal to rolling it.
Work done in rolling is more than in lifting.

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