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A radiator in a car should be analyzed as part of a closed system because it is designed to circulate coolant continuously within a sealed loop without losing or gaining any additional material from the surroundings. This helps maintain an optimal operating temperature for the engine.
No, there should not be pressure in the radiator after cooling down. If there is still pressure, it could indicate a problem with the radiator cap or the cooling system, such as a leak or a failing pressure release valve.
You should replace the radiator cap if it is leaking coolant, not sealing properly, or showing signs of damage. A faulty radiator cap can lead to issues like overheating, coolant loss, or air entering the cooling system, which can cause damage to your engine. Regularly inspecting and replacing the radiator cap can help prevent these problems and maintain the efficiency of your cooling system.
Momentum is constant in a closed system when there are no external forces acting on the system.
No, entropy is not always conserved in a closed system. Entropy can increase or decrease in a closed system depending on the processes happening within it.
Yes, it is possible for there to be negative pressure in a closed system.