At t= 19.8 seconds an object with mass 2.0 kg was observed to have a velocity of < 5, 25, -8> m/s. at t=20.02 seconds its velocity was < 16, 24, 24> m/s. what was the average (vector) net force acting on the object?

Explanation:

F = m Δv / Δt

F = (2.0 kg) (<16, 24, 24> m/s − <5, 25, -8> m/s) / (20.02 s − 19.8 s)

F = (2.0 kg) (<11, -1, 32> m/s) / (0.22 s)

F ≈ <100, -9.09, 291> N

as we know our atmosphere or air have different levels. every level has other gasses, and every gas has another permeability. when the light comes from lower permeability to higher permeability, it changes its direction. so that means that when the light comes from the moon to the earth, it changes it's direction many more times. it basically means that the shape of the light part of the moon is changed on the earth.

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according to jean piaget, in what stage of cognitive development are children able to understand conservation task?

b. preoperational

just took it