What makes simple machines useful for people without enough strength to complete a task? a. work is reduced, while time is decreased. b. input force is reduced, while time is increased. c. power is increased, while distance is decreased. d. input force is reduced, while distance is increased.

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  the unit of the measure =

explanation:

  the property that is quantified by the energy needed per of material to raise the temperature by one.

  si unit of energy = joule (j)

  si unit of temperature = kelvin (k)

  si unit of mass of material = kilogram (kg)

the property that is quantified by the energy needed per of material to raise the temperature by one is called specific heat.

the unit of specific heat is