"Why Airplanes Can Go to the Sky" Pressure and Buoyancy PPT Courseware 4

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"Why Airplanes Can Go to the Sky" Pressure and Buoyancy PPT Courseware 4

1. Fluid: a general term for liquids and gases

Question: What is the relationship between fluid pressure and flow rate?

Take a guess

Conjecture 1: The flow speed is small, the pressure is small; the flow speed is high, the pressure is strong.

Conjecture 2: The flow speed is small, the pressure is strong; the flow speed is high, the pressure is small.

Analysis and argumentation

in gas,

Where the flow velocity is smaller, the pressure is greater;

Where the flow velocity is greater, the pressure is smaller.

do you know?

On the platform of a railway station or subway station, there is a safety line marked about 1m from the edge of the platform. Passengers must stand outside the safety line to wait. Why is this?

Do you still know?

Which phenomena in our daily production and life can be explained by the relationship between fluid pressure and flow rate?

1. Sprayer

The air flow speed at the small hole is fast and the pressure is low. The air pressure above the liquid level in the container is strong, so the liquid rises along the thin tube. After flowing out from the mouth of the tube, it is impacted by the air flow and is sprayed.

2. The poet Du Fu wrote in "Song of Thatched Cottage Broken by the Autumn Wind": "The autumn wind roars in August and rolls up the triple thatch on my house." Please analyze the physical principles contained in the poem.

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"Why Airplanes Can Go to the Sky" Pressure and Buoyancy PPT Courseware 3:

"Why Airplanes Can Go to the Sky" Pressure and Buoyancy PPT Courseware 3 The relationship between gas pressure and flow velocity Blow air between two drooping papers: (1) Phenomenon (2) Compare the gas flow velocity inside and outside the two papers (3) Put forward your conjecture What is the relationship between the pressure of flowing air and the flow rate?

"Why Airplanes Can Go to the Sky" Pressure and Buoyancy PPT Courseware 2:

"Why Planes Can Go to the Sky" Pressure and Buoyancy PPT Courseware 2 Exploration Activity 1: Paper Blowing Experiment When you blow air between two pieces of paper, the two pieces of paper are not blown apart but move closer to each other. Why? Who pressed the two pieces of paper together? Exploration Activity 2: What cannot be blown down...

"Why Airplanes Can Go to the Sky" Pressure and Buoyancy PPT Courseware:

"Why Airplanes Can Go to the Sky" PPT Courseware on Pressure and Buoyancy 1. Fluids Both gases and liquids are fluid and are collectively called fluids. Liquid has pressure. There is pressure in all directions. Liquidity. Gas has pressure. 2. The relationship between fluid pressure and flow rate 1. Liquid pressure...

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Update Time: 2024-10-27

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