Answer:
Can enter or leave the system matter and energy. (The correct option is D)
Explanation:
Open system is defined as the system where exchange of matter, and energy occurs with its surrounding, presenting breaking down, and build up of its materials, and import, export of components.
Open system transfer the material into, and out of the system boundary, it contains an external interaction. A good example of open system is living things they actively connect with its environment, in results it shows changes in both the environment, and the living things.
So, the correct option is D.
Answer:
4135 kgm/s
Explanation:
From the question,
Change in momentum (I) = mass (m) × change in velocity (Δv)
I = mΔv............................................ Equation 1
I = m(v₂-v₁)...................... Equation 2
Given: m = 827 kg, v₂ = 12 m/s, v₁ = 7 m/s
Substitute these values into equation 2
I = 827(12-7)
I = 827(5)
I = 4135 kgm/s
<span>c. run towards a source of water to extinguish the fire
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Answer:
Explanation:
Acceleration is the rate of change of velocity. Usually, acceleration means the speed is changing, but not always. When an object moves in a circular path at a constant speed, it is still accelerating, because the direction of its velocity is changing.