1. Heat engine<\/b>
\nA tall glass cylinder is half-filled with hot water and topped up with cold water. A small ampule, containing a few drops of ether or alcohol (and closed off by a rubber pipette cap), is then put in. Describe the phenomena occurring in the system. How does the motion of the ampule change with time?<\/p>\n
2. Spider\u2019s web<\/b>
\nA spider\u2019s thread looks like a string of pearls. What is the reason for this? Make experiments to investigate the relevant parameters.<\/p>\n
3. Flying colours<\/b>
\nWhy do flags flutter in the wind? Investigate experimentally the airflow pattern around a flag. Describe this behaviour.<\/p>\n
4. Hazy<\/b>
\nThe colour of a distant forest appears not green, but hazy blue. What is the minimum distance at which this phenomenon is observed? How do weather conditions affect this? Is it possible that a forest can appear grey?<\/p>\n
5. Pond-skater<\/b>
\nIt is known that unwettable small bodies can float on water due to the surface tension force. Construct a floating raft based on this principle and calculate its static and dynamic parameters.<\/p>\n
6. Stop and start<\/b>
\nSometimes a flow of traffic can experience sudden stops and starts for no apparent reason. Build a physical model to explain why this occurs.<\/p>\n
7. Ohm\u2019s Law for a liquid<\/b>
\nIt is often said that electric current \u201cflows\u201d. Is this the only analogy between electric current and the flow of a liquid? Investigate theoretically and experimentally other analogies between these two things.<\/p>\n
8. Charged sand<\/b>
\nFine, well-dried quartz sand is poured out of a short thin tube into a conical metallic vessel connected to an electrometer. Investigate the behaviour of the sand stream as the vessel fills up. What changes if the stream is lit by a UV-lamp?<\/p>\n
9. Chromatography<\/b>
\nPut a drop of coloured liquid on a piece of absorbant paper. Describe quantitatively the observed phenomena.<\/p>\n
10. Sound cart<\/b>
\nConstruct and demonstrate a device that can be propelled solely by sound. Investigate its properties.<\/p>\n
11. Equilibrium<\/b>
\nFill a glass with water up to the point where a convex meniscus is formed. Place a table tennis ball on the surface of the water. Investigate and explain the stability of its equilibrium. Repeat your experiment with other liquids?<\/p>\n
12. Electroconductivity<\/b>
\nHow can you measure the electroconductivity of salt solutions without using direct contact electrodes? Analyse the problem and demonstrate your device.<\/p>\n
13. Spinning ball<\/b>
\nA steel ball of diameter 2\u20143 cm is put on a horizontal plate. Invent and construct a device, which allows you to spin the ball at high angular velocity around a vertical axis. The device should have no mechanical contact with the ball.<\/p>\n
14. Torn sail<\/b>
\nDetermine the dependence of the efficiency of a sail on its degree of perforation. What would be the effect of using a fishing net as a sail?<\/p>\n
15. Pulsating air bubble<\/b>
\nTrap an air bubble of radius 1\u20142 cm under an inverted watch glass beneath a water surface. Introduce alcohol into the bubble through a thin tube, controlling and adjusting the rate of flow until the bubble pulsates rhythmically. Study the phenomenon and explain your observations.<\/p>\n
16. Elastic pendulum<\/b>
\nStudy and describe the behaviour of a pendulum where the bob is connected to a spring or an elastic cord rather than to a stiff rod.<\/p>\n
17. Bottle battle<\/b>
\nTake two opened glass bottles of cola and knock one against the other. After a short while, the cola spurts out of one of the bottles. Investigate and explain the phenomenon.<\/p>\n","protected":false},"excerpt":{"rendered":"
1. Heat engine A tall glass cylinder is half-filled with hot water and topped up with cold water. A small ampule, containing a few drops of ether or alcohol (and closed off by a rubber pipette cap), is then put in. Describe the phenomena occurring in the system. How does the motion of the ampule […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"jetpack_post_was_ever_published":false,"footnotes":""},"class_list":["post-1941","page","type-page","status-publish","hentry"],"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/P4R8YU-vj","jetpack-related-posts":[],"jetpack_likes_enabled":true,"_links":{"self":[{"href":"https:\/\/tmfwarszawa.pl\/index.php\/wp-json\/wp\/v2\/pages\/1941","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/tmfwarszawa.pl\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/tmfwarszawa.pl\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/tmfwarszawa.pl\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/tmfwarszawa.pl\/index.php\/wp-json\/wp\/v2\/comments?post=1941"}],"version-history":[{"count":1,"href":"https:\/\/tmfwarszawa.pl\/index.php\/wp-json\/wp\/v2\/pages\/1941\/revisions"}],"predecessor-version":[{"id":1942,"href":"https:\/\/tmfwarszawa.pl\/index.php\/wp-json\/wp\/v2\/pages\/1941\/revisions\/1942"}],"wp:attachment":[{"href":"https:\/\/tmfwarszawa.pl\/index.php\/wp-json\/wp\/v2\/media?parent=1941"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}