"Conditions for Floating and Sinking of Objects" Pressure and Buoyancy PPT Courseware 2

Description

"Conditions for Floating and Sinking of Objects" Pressure and Buoyancy PPT Courseware 2

Method classification:

1. Gravity changes the buoyancy under certain conditions (i.e. changes the P liquid and V discharge).

For example, the V row can be changed by ships, etc., and the density can be changed by selection.

2. Buoyancy (volume remains unchanged) changes gravity under certain circumstances to achieve floating and sinking.

Such as submarines, balloons, airships, etc.

Now let the students do it by hand

Equipment: sink, plasticine, empty toothpaste tube, eggs, salt, water, beaker, stirrer.

1. How to make eggs float?

2. How to make plasticine and empty toothpaste skin float?

3. How to make the empty toothpaste skin sink?

Do the exercises in the lecture notes after the experiment (2)

Now let the students do it by hand

Equipment: One empty large bottle with lid, one empty small bottle with lid, tape, syringe, medical drip tube, scissors

Requirements: Make a homemade small submarine and make it float and sink.

Complete the exercises in the lecture notes after the experiment (3)

Introduction to hot air balloons

Hot air ballooning is developing rapidly in developed countries. There are more than 2,000 hot air balloons around the world, and there are competitions and activities almost every day. Picard and Jones successfully set a world record for a non-stop round-the-world flight in the "Spaceship Three" hot air balloon. The International Air Sports Association plans to organize a round-the-world flight race. The first event will be held in 2002, and plans to hold a world hot-air balloon round-the-world flight race every four years.

Hot air balloon festivals are held regularly in many cities around the world to promote tourism and other related industries and drive the development of the local economy. Saga City in Japan is a successful example. Every year, more than 100 hot air balloon teams participate in the Saga Hot Air Balloon Festival, and millions of people watch the event.

Introduction to airships

At present, airships are widely used in the fields of economic construction and social services. They are mainly used to transport materials and personnel to areas with difficult ground transportation, conduct aerial photography, explore fish schools, forest fire prevention, volume determination, traffic command, television broadcast, and tourism. wait.

Compared with other aircraft, airships have four major characteristics: first, they fly smoothly, have good controllability, and are easy to drive; second, they are safe, have low requirements for landing sites, and can fly at low altitudes and low speeds; third, they are low cost and have long endurance. It has a long range and a large payload capacity; fourth, its purchase, maintenance, site construction, flight and training fees are relatively low, and its operating costs are far lower than those of other aircraft.

Want to fly the Kongming Lantern yourself? This is a rare opportunity. Please help me summarize the content of this lesson. Students and teachers who speak passionately and have a complete summary will fly the Kongming Lantern together.

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For more information about the "Pressure and Buoyancy Conditions of Floating and Sinking Objects" PPT courseware, please click the "Pressure and Buoyancy ppt Floating and Sinking Conditions of Objects ppt" tag.

"Studying the Floating and Sinking Conditions of Objects" Buoyancy and Lift PPT Courseware 2:

"Studying the Floating and Sinking Conditions of Objects" Buoyancy and Lift PPT Courseware 2 Learning Objectives: 1. Through experiments, explore the floating and sinking conditions of objects; 2. Use the floating and sinking conditions of objects to explain the floating and sinking principles of submarines and balloons and the salvage method of buoys. What are the conditions for the floating and sinking of objects?

"Studying the Floating and Sinking Conditions of Objects" Buoyancy and Lift PPT Courseware:

"Studying the Floating and Sinking Conditions of Objects" Buoyancy and Lift PPT courseware Review the past and learn new things 1. What factors are related to the size of buoyancy? Liquid, V displacement 2. What is the relationship between the size of buoyancy and the weight of liquid displaced by an object? F float = G row 3. How to calculate the gravity of an object? G=mg=gV 4..

"Conditions of Floating and Sinking of Objects" Pressure and Buoyancy PPT Courseware:

"Conditions for Floating and Sinking of Objects" Pressure and Buoyancy PPT Courseware Observation and Thinking 1. Why does a wooden block submerged in water float upward? 2. Why does an iron block immersed in water sink to the bottom of a container? 3． Why can ships made of steel sail on the sea? 4. The object is...

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Update Time: 2024-09-26

This template belongs to Physics courseware Beijing Normal University eighth grade physics volume 2 industry PPT template

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