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實測世界最強紙飛機和各種奇妙紙飛機！簡單幾個步驟居然能飛幾十公尺遠？【胡思亂搞】

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【暖身】力學01｜(速度與加速度) 牛頓老師的蘋果教室

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【暖身】力學01｜(速度與加速度) 牛頓老師的蘋果教室

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【自然系列-物理 | 力學01】(速度與加速度) 牛頓老師的蘋果教室

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The following text is from Dean Wheeler's original Simulator. Most is still applicable for this Javascript Port

1. Is this simulator reliable? The simulator engine is based on the set ofthrust andflight equations described in this website. The equations involve relatively few simplifying assumptions and I believe this simulator can more reliably handle some exotic rocket designs than other simulators I have seen (even commercial water-rocket software). However, like any model--even a good model--the output depends on the input. Probably the most uncertain parameter that makes a huge difference in performance is the coefficient of drag. The simulator provides a conservative estimate you can use, based on the shape of your rocket and assuming relatively straight and stable flight, but this should not be taken as gospel truth. Fins, nosecones, and other external ornamentation, as well as orientation of the rocket to external airflow, all have an effect. I recommend a "fitting" experiment, in which you launch a rocket and assess its apogee height and then adjust the drag coefficient so that the simulator and experiment agree. Then the simulator can be used to explore changes in other variables. As a final note, I would add that the simulator solves different equations for different phases of flight (launch tube, water thrust, and gas thrust). It must figure out when to transition between these equations and sometimes, for certain unpredictable combinations of parameters, it gets stuck in an iteration loop. If the simulator seems to stall or freeze, try a slightly different set of parameters (even just by changing one parameter by a small amount) and hopefully it should work. Did I tell you that this is beta software?

2. What is a "launch tube"? It is a smooth hollow tube that is mounted to the launcher and inserted into the rocket nozzle. Upon launch, the rocket slides up the tube. If there is a reasonably close fit between the outer surface of the tube and the inside of the rocket nozzle, then the tube/rocket combination acts like a piston, providing very efficient acceleration to the rocket while it is traveling up the tube. Another benefit of launch tubes is that they guide the initial motion of the rocket so that is flies straight. Wobbly flight of the rocket will increase air drag and make the trajectory less preditable. Some launchers use launch tubes (like the home-built Clark cable design); some do not (like the Pitsco AquaPort launcher used by Science Olympiad). The simulator can predict the principal effect of the launch tube (a boost in total thrust), but makes no attempt to predict flight stability issues.

3. What is "launcher volume"? It is the volume of pressurized gas stored inside the launcher apparatus (excluding the launch tube) that is accessible to the rocket. By "accessible" I mean there is no valve or significant constriction between this volume and the volume of gas inside the rocket itself. Why is this quantity needed by the simulator? Because this gas volume works to maintain pressure inside the rocket while the rocket is traveling up the launch tube. So if a launcher does not use a launch tube then there is no effect. For launch-tube-type launchers, creating a large launcher volume provides a modest improvement in performance, depending on the length of the launch tube. But it does waste pressurized gas, so if you are building a launcher that will be used to launch many rockets in succession it is probably a bad idea to give it a large volume.

4. What is a "T-nozzle"? In the simulator if you make the launch tube diameter greater than the rocket nozzle diameter, a warning statement is given under the Results tab indicating a T-nozzle is in use. A T-nozzle is a small tube-shaped device that fits inside the rocket. It is shaped to sit in the throat area of the nozzle (without being ejected) and to force the outlet flow of water/gas through a smaller diameter, allowing for a longer duration thrust and more dramatic launch. The T-nozzle initially sits loosely on top of the launch tube and gets seated in place after the rocket flies off of the launch tube. With the T-nozzle in use, the rocket nozzle diameter used in the simulator should be the inside diameter of the T-nozzle. Do a web search on "T-nozzle" if you want more information.

5. What is "Nozzle Adjuster" A, B, and C? These three are variables I made up that control the shape of the bottle near its tail-end or nozzle. If you change these variables in the applet you will see the cartoon on the right change as well. Make the cartoon look like the bottle shape you are using for your rocket. Because the shape of the tail changes the external aerodynamics of the rocket, these adjustments will change the appropriate value of drag coefficient. The default values of A, B, and C are set to reproduce the typical shape of 2-liter soda bottles in the United States.

6. What is the optimal amount of water to add to a rocket? That's what simulators like this are used for--change the value and see the predicted effect on performance. The fact that there is an optimal amount of water can be explained by the fact that there is a trade-off between competing effects. The water in the rocket is a reaction mass. It allows for efficient conversion of pressure energy (stored in the gas) into kinetic energy (motion) of the rocket. On the other hand, any water you add to the rocket takes away gas volume, which is where the energy is stored. So you are trading off the amount of energy stored in the rocket with the efficiency with which that energy can be used to propel the rocket upward. There is an optimal point where thrust and apogee height are maximized. Understanding and dealing with trade-offs like this is the essence of engineering.

7. What do you mean by "total volume" of the rocket? Total volume is the total internal volume used to store water and pressurized gas, i.e. the size of the bottle. Note that under pressure every bottle elastically stretches a bit, increasing its volume above the nominal stated value. This can be observed by doing a pressure test on a bottle in which it is filled 100% with water and then pressurized gas is added. I have found that 2-liter soda bottles, under 100 psi (7 bar) pressure have a total volume closer to 2.1 liters, which is the default value on the simulator.

8. What do you mean by "empty mass" of the rocket? Empty mass is the mass of the rocket vehicle (bottle+fins+nosecone+payload) at the conclusion of the thrust phase, when all the liquid and pressurized gas have been expelled.

9. What coefficient of drag should I use? See my response to the first question above.

10. What are water and gas "thrust efficiency"? This is the fraction of available energy that is NOT lost to friction when trying to expel the water and gas, respectively, from the rocket. As long as the inside of your rocket/bottle is smoothly tapering and does not have additional plumbing, I recommend you leave these two quantities at their default value (0.97).

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How to Play Flappy Bird

Flappy Bird's gameplay is best described as simple, addictive, yet mildly infuriating. Tap carefully to raise the bird up and navigate through the gaps in the green pipes without crashing. When the inevitable crash occurs, you'll earn a score that you can try and outdo on your next run. It's addictive!

Play it Only on the Web.

Flappy Bird was originally created as a mobile game but was later removed from the app stores and in an interview with Forbes, Dong Nguyen, the developer of Flappy Bird, cited the game's addictive nature as the reason for its removal from the stores.

Despite this, you can still play the original Flappy Bird for free in your web browser, using a desktop or mobile device!

The Legacy of Flappy Bird

Flappy Bird was part of an early revolution in hypercasual mobile games. Plenty of simple one-button and side-scrolling games have been released since its inception. The game spawned numerous remakes, clones, and parody games that took the concept to new levels.

More Games Like This

You can find games that utilize this concept of keeping up an object or animal in our casual game category. Popular games like Tap Tap Shots and Square Bird. However, even before Flappy Bird, there were similar classic games like Copter that people could play for free on the web.

Other casual games worth playing are Tiny Fishing, Dumb Ways to Die, and Eggy Car.

Features

Incredibly simple mechanics

Frustrating but addictive

High score tracking

The original Flappy Bird

Release Date

Early 2014

Platform

Web browser (desktop and mobile)

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Flappy Bird is an iconic side-scrolling game in which you click to avoid obstacles. It was originally released as a mobile game but discontinued by its developer, Dong Nyugen. Today, you can play this simple but addictive one-button game online.

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Explore, play and learn with Santa's elves all December long

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Play Physics Drop Game Online on CarGames.Com

Physics Drop is a fun puzzle game. There are more than 30 levels for you. You need to draw as many lines or polygons as needed to gradually make the blue ball fall into the U-style basket. Can you use both the ball and the lines to react to the law of gravity? Tell you a secret, it is very important to position the line in the support bracket. Just to draw a short line you can push the ball rolling. If you get stuck, click on the restart button. If you are finding a fun way of practicing physics, have a try!

Game Features

Easy to draw lines

Play rules follow basic physics rules

Mastering: Expert Tips and Tricks

1. Draw a route to the hole first: If you don't, the ball will move and fall on the lower places

2. Draw lines or dots to crash the ball: Gravity and crashing power will move it

Control

On PC

Hold the mouse left click = draw

How many people like the game and when is the publish date?

76% of 35636 players like it, and the game was played 1,828,774 times since October-26th-2017

Can I play the game on desktop, mobile phones and tablets?

Yes, of course. The game can be played on your computer and mobile devices like phones and tablets.

Can I Play For Free?

Yes, you can play all games online for free on CarGames.Com. Just visit the page in a Web browser (desktop, mobile or pad) and enjoy yourself.
Play Car Games and other online games for Free on CarGames, No Download or Installation Required. Play Games Right Now and Enjoy Your Time!

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Put your brain to work in this addictive puzzle game. Physics Drop is the perfect time killer because all levels can be solved in many creative ways.

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光學01｜ (光的直進性和反射)阿基米德怒燒羅馬大

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光學01｜ (光的直進性和反射)阿基米德怒燒羅馬大

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Back

【暖身】光學01｜ (光的直進性和反射)阿基米德怒燒羅馬大（？）軍【part1】

⇐ Use this menu to view and help create subtitles for this video in many different languages. You'll probably want to hide YouTube's captions if using these subtitles.

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【暖身】光學01｜ (光的直進性和反射)阿基米德怒燒羅馬大（？）軍【part1】 | 合作夥伴 | 均一教育平台

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影片：【暖身】光學01｜ (光的直進性和反射)阿基米德怒燒羅馬大（？）軍【part1】，合作夥伴 > 🧪LIS 情境科學教材 > LIS自然系列－物理。源自於：均一教育平台 - 願 每個孩子都成為終身學習者，成就自己的未來。

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(光的直進性和反射)阿基米德怒燒羅馬大（？）軍 - 【part2】

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(光的直進性和反射)阿基米德怒燒羅馬大（？）軍 - 【part2】

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【自然系列-物理 | 光學01】(光的直進性和反射)阿基米德怒燒羅馬大（？）軍 - 【part2】

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Kaleidoscope is an online drawing tool to create your own amazing kaleidoscope shows or still images. You can also save and load your project easily!

Release Date

November 2020

Developer

Kaleidoscope is developed by Radiant Games LLC.

Platform

Web browser

Apr 13, 2023

Controls

Mouse and keyboard shortcuts

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Kaleidoscope is an online drawing tool to create your own amazing kaleidoscope shows or still images. You can also save and load your project easily!

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1) 先將鋁箔弄皺後再攤開，則當光在凹凸不平的鋁箔上反射時，其入射角和反射角的關係為何？ a) 入射角＞反射角 b) 入射角＜反射角 c) 入射角＝反射角 d) 視凹凸的情況而定 2) 下列何者不是應用凹面鏡的裝置？ a) 探照燈 b) 汽車的車前燈 c) 手電筒 d) 山路彎道處的反射鏡 3) 圖中的A、B兩平面鏡互相垂直，入射光線與A夾30度角。對A而言，入射角為多少度？ a) 30 b) 60 c) 90 d) 120 4) 手電筒、車燈可以照得很遠是因為光源裝在哪種鏡面前？ a) 平面鏡 b) 凸面鏡 c) 凹面鏡 d) 凹凸面鏡 5) 將一隻小鴨置於平面鏡前面，則下列哪一個成像是正確的？ a) b) c) d)

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1) 先將鋁箔弄皺後再攤開，則當光在凹凸不平的鋁箔上反射時，其入射角和反射角的關係為何？ 2) 下列何者不是應用凹面鏡的裝置？ 3) 圖中的A、B兩平面鏡互相垂直，入射光線與A夾30度角。對A而言，入射角為多少度？ 4) 手電筒、車燈可以照得很遠是因為光源裝在哪種鏡面前？

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8-Ball Billiards is a free online pool game. You can play solo against AI or challenge other players in two-player mode. The game is easy for anyone to start playing, so pick up a cue and line up your first shot.

How to Play

Pick a ball

8-Ball Billiards is an intuitive billiards game where you have to pot all of the striped or spotted balls. The balls you're assigned depend on what ball is potted first.

Line up your cue

The controls are easy, simply click and drag to find the right level of force, then line up the angle with the ball that seems easiest to pot next. Remember that this is pool, so save the 8-ball until you have potted all your balls - otherwise, you will lose!

More Games Like This

Take a look at our pool games collection for more cue-based games. Two other popular titles in this category are 8-Ball Pool and Pool Club. If you want to play online multiplayer pool, check out 8-Ball Pool with Friends.

Features

Easy and intuitive controls

Play against the computer or a friend

Keep track of your stats

Smooth graphics and animations

Release Date

April 2018

Platforms

This game is a web browser game (desktop and mobile).

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8 Ball Billiards Classic 🕹️ Play 8 Ball Billiards Classic on CrazyGames

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8-Ball Billiards is a free online pool game. You can play solo against AI or challenge other players in two-player mode. The game is easy for anyone to start playing, so pick up a cue and line up your first shot.

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Cue Billiard Club is a realistic sports game, a 3D pool game that can be enjoyed by all ages. There are hundreds of tricky levels you can play. Play it solo, against your friend or AI.

How to Play Cue Billiard Club

There are several game modes to choose from, which include:

Practice: single-player game mode to improve your aiming and shooting skills.

Tournament: play against the computer with adjustable difficulty levels.

Pass & Play: play against your friend in this turn-based game mode.

You can also choose from various game types, which include:

8 & 9 Ball Pool: play the most popular types of pool billiards.

Snooker: try out a bigger table with smaller balls if you are looking for challenges.

Trick shots: complete preconfigured table setups in as few shots as possible.

Release Date

May 2022

Developer

Obumo Games made Cue Billiard Club.

Platform

Web browser

More Games Like This

Keep the game hype alive by diving into our sports category, where you'll find a slam-dunk selection of games like baseball, soccer, football, tennis, basketball, and so much more! Test your skills with fan-favorite basketball games like Basket Random and Basketbros, or step up to the plate with classics like Backyard Baseball. Get ready to play and show off your moves!

Jul 08, 2024

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Cue Billiard Club is a realistic sports game, a 3D pool game that can be enjoyed by all ages. There are hundreds of tricky levels you can play. Play it solo, against your friend or AI.

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由於 貓狗大戰雙人版 網頁版網頁小遊戲是試玩版 只能線上玩的Web遊戲 不支援下載 不是免安裝的電腦版 所以儲存等功能都不完全.一些瀏覽器也不支援本遊戲 所以能夠遊玩是您運氣好 如果能玩.盡量不要關閉您的頁面

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康軒國中自然遊戲網~提供一系列獨家自然遊戲、Wordwall評量等，手機平板都可以使用！

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風靡全球的小遊戲《憤怒鳥遊戲》真正的flash版震撼降臨！《憤怒鳥遊戲》又名瘋狂的小鳥，

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愤怒的小鸟(Angry Birds)是一款超级热门的物理弹射类游戏。在这个游戏中,玩家需要射出不同的鸟类,毁灭堡垒,消灭里面的小猪。

游戏背景设定在一个鸟类和小猪共存的世界。某天,小猪们突然转变了暴戾,肆意偷窃鸟蛋。为了赢回失去的鸟蛋,可爱的鸟们化身"愤怒小鸟",发动反击。

在每个关卡中,玩家要拖拽鸟类,通过改变弹射角度和力度,击毁木板搭成的各种建筑,将里面的小猪消灭。不同的小鸟具有不同的能力,玩家需要综合运用,通过有限的鸟类数量来获得最高分数。

随着关卡的进展,小猪的建筑越来越牢固,玩家需要思考更好的策略来取得胜利。此外,游戏中还添加了炸弹、石块等元素,丰富了玩意。

愤怒的小鸟 拥有可爱的画风和物理引擎,让击倒小猪的过程无比过瘾。它让人上瘾的游戏体验让它成为了App Store中最受欢迎的游戏之一。

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bash # install dependencies $ yarn install