[DSE Physics] Ultrasound 超聲波

[@tszhonwong2295]

簡單易明又有趣嘅片 就算我考完dse都會想睇 香港真係需要多d好似你咁嘅老師👍

[@MarcYam]

其實香港都有好多好用心既老師，只係我個人比較無聊，所以會花時間拍片，其他老師就花時間做多好多實務既嘢咁解。

[@tszhonwong2295]

唔係個個人無聊都會做d咁有意義嘅野 希望你繼續加油 拍多d好片比大家！

[@ifanboy9769]

物理系學生都好鍾意睇！

[@joshuacheung7539]

Thanks Marc Yam, watched your videos and got 5** in 2020 DSE physics!!! (遲來的報喜)

[@MarcYam]

好勁!!! 恭喜晒🥳🥳🥳

[@EdwardChan.999]

實驗證明咗貓頭鷹好醒目

[@MarcYam]

見到蝙蝠飛得咁開心就比人刮眼，係我我老虎蟹都唔飛啦！

[@kevinlam8808]

Marc sir 0:23 今次連大西洋都抽乾埋😂😂😂

[@abhcy]

0:23 畀返個警告有恐怖嘢啦

[@MarcYam]

係我錯，大家18歲以下應該搵埋家長陪同先好睇。

[@Himmy-b5e]

@@MarcYam 😂PG 家長指引

[@AC-fw4qu]

六分鐘幫我鞏固返我啲sound, thx 加油🔥🔥🔥

[@dogkc]

我怕黑 但係我更怕林鄭

[@crosbybrownnewbold466]

BB變叉燒同畸貽果度我笑左

[@freddie0623]

0:23 任sir你嚇死我了 怕怕xd

[@kw4593]

明明我唔係讀physics都好鍾意睇你啲片XD Support

[@a_person_on_the_edge7650]

上bio堂聽過前面蝙蝠嘅實驗😂

[@ohyeah6522]

期待會出chapter 5 radiation 個課😭😭

[@speechless9648]

DSE考生大推！！

[@crosbybrownnewbold466]

失縱人口回歸

[@MarcYam]

然後又失蹤過。

[@mycatsareverycute5276]

只可惜就算識用ultrasound避開障礙物，喺某國都避唔開成為九大簋嘅命運

[@crosbybrownnewbold466]

佢係點知隻貓頭鷹企左係度，完全無光嘅話（熱敏？）

[@MarcYam]

無詳細睇，有無人知？

[@tomjoestar3361]

@@MarcYam 其實隻貓頭鷹冇企咗喺度，佢係不斷咁亂飛同埋亂撞 When he repeated the test with his tame barn owl - or "night-bird", as he called it - the owl became clumsy in total darkness. It flew into the walls. It collided gracelessly with objects in the room. New Scientist. 11/18/2017, Vol. 236 Issue 3152, p44-45. 2p. 但係隻蝙蝠就飛得好正常（Holding tightly to it like a strange kite, he occasionally felt the bat tugging in different directions as it flew around in the pitch-black room.）所以佢先開始做實驗。

[@MarcYam]

@@tomjoestar3361翻查返發現有啲書寫當時隻貓頭鷹唔飛，有啲書寫佢飛但係撞到嘢。不過後者應該合理啲，否則我地點知佢唔肯飛。

[@crosbybrownnewbold466]

@@tomjoestar3361 thx

[@crosbybrownnewbold466]

@@MarcYam 我諗緊正常如果5知周圍嘅環境係咩嘅時候5係應該5郁咩，除非佢受到外來驚嚇

[@tszlungip2312]

會唔會拍Heat and gases

[@MarcYam]

會

[@子浩-m4v]

Eeee 咁落雨咪用唔到microwave

[@kit3046]

幾時拍heat and gas？

[@MarcYam]

sound 仲有一條片，之後就會到Heat and Gases

[@沁沁-l1s]

條片百分百 like

[@veigar1001]

咁都係閂返埋盞燈去啦

[@MarcYam]

究竟邊個夜晚會一開燈就見到林太咁不幸？？

[@FrozenBusChannel]

@@MarcYam 林兆波

[@blackca.]

(怕 科學家真係好有求(虐)知(待)精神

[@monoemilide7524]

可5可以教下heat🙏🏻🙏🏻d heat capacity and latent heat 搞到我好亂🙉🙉🙇🏻‍♀️

[@MarcYam]

就黎有呀喇！

[@tealeafegg4900]

隻蝙蝠好慘

[@nickyyuen9426]

叉燒ww真係痴線

[@peterwan816]

我發現你又讀錯英文，你成功將Navigation轉化為navigating。

[@MarcYam]

多謝指正！！

[@yee2286]

1

[@Himmy-b5e]

mike lo 😒

[@blackca.]

噗哧