When pushing a child on a swing, you must give them a push periodically to keep them moving. this seems to go against the law of inertia and the conservation of energy. when pushing a child on a swing, you must give them a push periodically to keep them moving. this seems to go against the law of inertia and the conservation of energy. why does the child need a push periodically to keep moving. a) energy is lost over time slowing down the swing. b) all objects will naturally come to rest over time. c) a wind must have been blowing in the opposite direction. d) friction provides an outside force slowing the swing down.

DFriction provides an outside force slowing the swing down.

Explanation:

D)Friction provides an outside force slowing the swing down.

Explanation: Inertia states that an outside force is needed to change the motion of an object. Friction provides an outside force slowing the swing down.

  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

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2