Because air outside is generally cooler than where a heat causing engine is. The combustion chamber inside super heats the air
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The temperature difference between the intake and exhaust of a system is due to the conversion of energy. Energy is added to the system at the intake, causing an increase in temperature as fuel is burned. The exhaust, on the other hand, expels the waste heat from the system, resulting in a temperature difference between the two points.
Using a window fan for both exhaust and intake purposes in a room can help improve air circulation, reduce humidity, and lower indoor temperatures. This can lead to better air quality, increased comfort, and potential energy savings.
Adjust the air intake and gas flow to control the temperature of a Bunsen burner. Increasing air intake will result in a hotter flame, while reducing it will make the flame cooler. Similarly, adjusting the gas flow will also affect the temperature of the flame.
Weight is determined by the balance between energy intake and energy expenditure. When energy intake exceeds expenditure, the excess energy is stored as fat, leading to weight gain. On the other hand, if energy expenditure exceeds intake, the body uses stored energy reserves, resulting in weight loss. Maintaining a balance between energy intake and expenditure is crucial for weight management.
Valve overlap occurs in a four-stroke engine at the end of the Exhaust stroke and at the beginning of the Induction stroke; and is when both the exhaust and inlet valves are open at the same time. At the end of the Exhaust stroke, the Exhaust valve is closing and the Inlet valve is starting to open in preparation for the induction of fuel and air into the cylinder. It is common knowledge that in vehicles that cannot alter the valve timing, the Inlet valve opens approx 6 degrees before top-dead-centre and the Exhaust valve closes at 9 degrees after top-dead-centre
The gas vapor air mixture enters the cylinder during the intake stroke of the four-stroke cycle. This mixture is then compressed during the compression stroke before being ignited by a spark plug, leading to combustion and generation of power during the power stroke. Finally, the exhaust gases are expelled during the exhaust stroke.