1. Invent Yourself

Take a box (e.g. a matchbox), filled with identical objects (e.g.matches, balls, …). Find a method to determine the number of objects in the box solely by the sound produced while shaking the box. How does the accuracy depend on the properties of the objects, the box, and the packing density?

1. 自己發(fā)明

拿一個盒子(如火柴盒)來說，里面裝滿了相同的東西(如火柴、球等)。找到一種僅通過搖晃盒子時產(chǎn)生的聲音，來確定盒子中物體數(shù)量的方法。研究這種方法的精確度是如何取決于物體、盒子和包裝密度等性質(zhì)的？

2. Droplet Microscope

By looking through a single water droplet placed on a glass surface, one can observe that the droplet acts as an imaging system. Investigate the magnification and resolution of such a lens.

2. 液滴顯微鏡

透過放置在玻璃表面上的單個水滴，我們可以觀察到水滴就像一個成像系統(tǒng)。研究這種透鏡的放大倍率和分辨率。

3. Rigid Ramp Walker

Construct a rigid ramp walker with four legs (e.g. in the form of a ladder). The construction may begin to 'walk' down a rough ramp. Investigate how the geometry of the walker and relevant parameters affect its terminal velocity of walking.

3. 剛性坡道行走器

建造一個有四條腿的剛性坡道行走器（例如梯形的樣式）。該結(jié)構(gòu)可能開始沿粗糙的斜坡向下“行走”。研究行走器的幾何形狀以及相關(guān)參數(shù)是如何影響其行走終端速度的。

4. Charge Meter

A lightweight ball is suspended from a thread in the area between two charged plates. If the ball is also charged it will be deflected to one side at a certain angle. What is the accuracy of such a device for measuring the amount of charge on the ball? Optimise your device to measure the smallest possible charge on the ball.

4. 電荷測量計

一個輕球被一根線懸掛在兩個帶電板之間的區(qū)域。如果球也帶電，它會以一定的角度偏向一側(cè)。這種測量球上電荷量的裝置的精度是多少?優(yōu)化你的設(shè)備來測量球上盡可能小的電荷。

5. Ping Pong Rocket

A ping pong ball is placed in a container of water. When the container is dropped, the ping pong ball will get launched to a great height. What maximum height can you reach with up to 2 liters of water?

5. 乒乓球火箭

將一個乒乓球放在裝水的容器中。當容器掉落時，乒乓球?qū)⒈话l(fā)射到一個很高的高度。使用最多2升水，你能達到的最大高度是多少?

6. Non-contact Resistance

The responses of an LRC circuit driven by an AC source can be changed by inserting either a non-magnetic metal rod or a ferromagnetic rod into the inductor coil. How can we obtain the magnetic and electric properties of the inserted rod from the circuit’s responses?

6. 非接觸式電阻

通過在電感線圈中插入非磁性金屬棒或鐵磁性棒，可以改變由交流源驅(qū)動的LRC電路的響應(yīng)。我們?nèi)绾螐碾娐返捻憫?yīng)中獲得插入棒的磁性和電學(xué)性質(zhì)?

7. Giant Sounding PlateWhen a large, thin and flexible plate (e.g. plastic, metal or plexiglass) is bent, it may produce a loud and unusual howling sound. Explain and investigate this phenomenon.7. 巨型發(fā)聲板

當一個又大又薄又有彈性的板(如塑料、金屬或有機玻璃)被彎曲時，它可能會發(fā)出一種響亮而不尋常的呼嘯聲。解釋并研究這一現(xiàn)象。

8. Another Magnetic Levitation

Place a large disk-shaped magnet on a non-magnetic conductive plate. When a smaller magnet is moved under the plate, the magnet on top may levitate under certain conditions. Investigate the levitation and the possible motion of the magnet on top.

8. 另一類磁懸浮

將一個大的圓盤形磁鐵放在一個非磁性導(dǎo)電板上。當一個較小的磁鐵在板下移動時，在一定條件下，上面的磁鐵可能會懸浮起來。探究此類磁懸浮現(xiàn)象和上面磁鐵可能的運動。

9. Juicy Solar CellA functional solar cell can be created using conducting glass slides, iodine, juice (eg. blackberry) and titanium dioxide. This type of cell is called a Gr?tzel cell. Make such a cell and investigate the?necessary parameters to obtain maximum efficiency.9. 果汁太陽能電池一個功能性的太陽能電池可以用導(dǎo)電玻片、碘、果汁(例如黑莓)和二氧化鈦來制備。這種類型的電池單元稱為Gr?tzel電池。制作這樣一個電池，并探究必要的參數(shù)以獲得最大的效率。

（workshop內(nèi)容請關(guān)注隨后的推文）

10. Magnetic GearTake several identical fidget spinners and attach neodymium magnets to their ends. If you place them side by side on a plane and rotate one of them, the remaining ones start to rotate only due to the magnetic field. Investigate and explain the phenomenon.

10. 磁力齒輪拿幾個相同的指尖陀螺，在它們的末端貼上釹磁鐵。如果你把它們并排放在一個平面上，并旋轉(zhuǎn)其中一個，剩下的就會因為磁場而開始旋轉(zhuǎn)。探究并解釋這一現(xiàn)象。

11. Pumping Straw

A simple water pump can be made using a straw shaped into a triangle and cut open at the vertices. When such a triangle is partially immersed in water with one of its vertices and rotated around its vertical axis, water may flow up through the straw. Investigate how the geometry and other relevant parameters affect the pumping speed.

11. 吸管水泵

一個簡單的水泵可以用一根吸管折成三角形，并在頂點處切開來實現(xiàn)。當這樣一個三角形的一個頂點部分浸入水中并繞其垂直軸旋轉(zhuǎn)時，水可能會通過吸管向上流動。探究幾何形狀和其他相關(guān)參數(shù)是如何影響抽速的。

小編點評：當你旋轉(zhuǎn)吸管時，它會迫使里面的水一同旋轉(zhuǎn)。一個物體在旋轉(zhuǎn)，物體上的任何部分都能感覺到一股力把它往外推，這種力就是我們通常所說的離心力。這意味著在你的吸管里，水被向外推，而它向外移動的唯一方法是向吸管上部移動——表現(xiàn)出的效果就是水被向上泵。如果你旋轉(zhuǎn)吸管的速度足夠快，那么水就會從吸管中流出并向外飛。是不是原理也不是很難，剛進一起來試試探究吧！！

12. The Soap Spiral

Lower a compressed slinky into a soap solution, pull it out and straighten it. A soap film is formed between the turns of the slinky. If you break the integrity of the film, the front of the film will begin to move. Explain this phenomenon and investigate the movement of the front of the soap film.

12. 肥皂螺旋

將一個壓縮的玩具彈簧放入肥皂溶液中，拉出并拉直。玩具彈簧的轉(zhuǎn)彎處形成了肥皂膜。如果破壞了膜的完整性，膜的前部就會開始移動。解釋這一現(xiàn)象并調(diào)查肥皂膜前部的運動。

13. Shooting Rubber Band

A rubber band may fly a longer distance if it is non-uniformly stretched when shot, giving it spin. Optimize the distance that a rubber band with spin can reach.

13. 射擊橡皮筋

如果橡皮筋在射擊時不均勻拉伸，使其旋轉(zhuǎn)，則可以飛得更遠。優(yōu)化帶旋轉(zhuǎn)的橡皮筋能到達的距離。

14. Ruler TrickPlace a ruler on the edge of a table, and throw a ball at its free end. The ruler will fall. However, if you cover a part of the ruler with a piece of paper and repeat the throw, then the ruler will remain on the table while the ball will bounce off it. Explain this phenomenon, and investigate the relevant parameters.14. 尺子魔術(shù)將一把尺子放在桌子邊上，并向其自由端扔一個球。尺子會掉下來。然而，如果你用一張紙蓋住尺子的一部分并重復(fù)投擲，那么尺子將保持在桌子上，而球?qū)⒈凰鼜椘?。解釋這一現(xiàn)象，并探究相關(guān)參數(shù)。

15. Wet Scroll

Gently place a piece of tracing paper on the surface of water. It rapidly curls into a scroll and then slowly uncurls. Explain and investigate this phenomenon.

15. 濕紙卷

輕輕地將一張描圖紙放在水面上。它迅速卷成一個紙卷，然后慢慢展開。解釋并探究這一現(xiàn)象。

16. Cushion CatapultPlace an object on a large air cushion and drop several other objects in such a way that the first object is catapulted away. Investigate how the exit velocity depends on relevant parameters.

16. 氣墊彈射器

將一個物體放在一個大的氣墊上，然后以同樣的方式把其他幾個物體扔下去，這樣第一個物體就會彈射出去。研究出射速度與相關(guān)參數(shù)的關(guān)系。

17. Quantum Light Dimmer

If you put a flame with table salt added in front of a vapor sodium lamp, the flame casts a shadow. The shadow can become lighter if the flame is put into a strong magnetic field. Investigate and explain the phenomenon.

17. 量子調(diào)光器

如果你把添加了食鹽的火焰放在鈉蒸汽燈前，火焰會投射出陰影。如果火焰被置于強磁場中，影子會變得更淺。探究并解釋這一現(xiàn)象。

小編點評：鈉蒸汽燈是由鈉金屬電極在高溫下放出黃光的一種照明設(shè)備，這種黃光是人類最敏感的顏色之一，因此受到了廣泛的應(yīng)用。與傳統(tǒng)的白光燈源相比，鈉蒸汽燈在照度、色溫、光效等方面表現(xiàn)出更好的性能。由于黃光的波長長，散射較小，因此鈉蒸汽燈在照明方面有比較明顯的優(yōu)勢。另外，鈉蒸汽燈的反射率也比較高，這使得照射的區(qū)域更加均勻。