天同

[匿名]

回覆: 1

2016-04-03 5:29 am

The total energy consumption of HK in 2008 was 285,430 TJ. Calculate the land area that is required for solar panels.?

[匿名]

回覆: 1

2016-03-20 3:36 am

請問一下 喝完飲料後 拔出吸管 最底下還會有一些些量殘留而不會滴下去 這是什麼原理? 請詳答 感恩喔!?

Chloe

回覆: 3

2016-03-19 4:15 pm

鈷-60的原子核有多少中子?

[匿名]

回覆: 3

2016-03-11 2:23 am

想請問 鋁的比重2.85 2mmX128mmX170mm 要如何計算重量?? 之前人家是教我用密度算 所以我怎麼都算不出來... 麻煩大大幫麻解答 感謝?

whyman

回覆: 2

2016-03-02 3:39 am

發光二極管是否含紫外線?

用戶36732

回覆: 1

2016-02-10 1:59 pm

In order to keep warm inside a room with glass windows, is it correct to put a piece of transparent plastic over the entire window frame?

用戶36732

回覆: 1

2016-02-10 1:44 pm

After a nuclear accident, why need two emergency actions: insertion of control rods inside the reactor & continuous spraying of cold water?

Wayan

回覆: 1

2016-02-06 7:43 am

把活線和中線的位置調轉的問題係咩？？？

[匿名]

回覆: 1

2016-01-27 9:30 am

why is the rainbow round in shape?

chung

回覆: 1

2016-01-25 2:03 pm

一條AL reflection interference問題?

Dan

回覆: 1

2016-01-20 11:22 am

物理:電路 把開關S斷開?

[匿名]

回覆: 2

2016-01-02 2:57 pm

Physics Question?

用戶4429

回覆: 1

2016-01-01 6:38 pm

對於物質 功與動能換算的疑問?

用戶33729

回覆: 1

2015-12-12 6:47 am

我想問個反作用力系 mg cos定系mg cos +mg sin?

Ls

回覆: 1

2015-12-11 5:49 am

A question about double-slit experiment with cover.?

Ls

回覆: 1

2015-12-06 4:22 am

standing wave的問題?

[匿名]

回覆: 1

2015-12-03 10:00 am

Lens Draw 6 construction rules?

c_chan

回覆: 1

2015-12-02 2:30 pm

SPL= 20log10 (Prms/Pref) dB SPL at Prmsc= 50 x 10既3次方uPa = 60dB 是否正確? 公式是怎樣?

c_chan

回覆: 1

2015-12-02 2:28 pm

Is it true？ I want to know how to calculate?

[匿名]

回覆: 1

2015-11-22 6:59 pm

物理:有關靜電學一問?

[匿名]

回覆: 1

2015-11-12 3:53 pm

Electricity and Life Multiple Choice?

[匿名]

回覆: 1

2015-11-11 2:01 pm

Electricity and Life Multiple Choice?

水

回覆: 1

2015-11-05 3:50 pm

Find the mass flow rate and velocity?

[匿名]

回覆: 1

2015-11-05 5:03 pm

係搵internal resistance of battery既experiment入面 有咩errors呀? 個set up有電池 ammeter voltmeter rheostat 急?

[匿名]

回覆: 1

2015-11-02 1:11 pm

有關聲音現象一問(物理)?

[匿名]

回覆: 1

2015-10-22 4:47 pm

大學電力題目(英文),不會做求幫助.?

國輝

回覆: 1

2015-10-21 11:39 am

F4.Physic求解答?

[匿名]

回覆: 1

2015-10-18 10:03 am

有關光的波動現象問題一問?

[匿名]

回覆: 2

2015-10-17 5:25 pm

白努力與大氣壓力之間的關係?

[匿名]

回覆: 3

2015-10-15 12:42 pm

1kw的無線電傳送器在頻率880kHz下運作，每秒發射多少光子？

[匿名]

回覆: 1

2015-10-12 12:55 pm

一部行駛中的汽車正在減速停車，此時在車內杯架上放置的一杯水，水面與水平街道恰呈現15度角，試決定此時汽車的減速度?

[匿名]

回覆: 1

2015-10-05 11:57 pm

利用2kW浸沒式電熱器把1kg溫度為12C的水加熱10分鐘,求有多少水被汽化?

[匿名]

回覆: 2

2015-09-28 6:14 am

物理題目一問 急!!?

韋廷

回覆: 1

2015-09-25 4:22 pm

在同一高度，在同一點，以相同速率v同時仰角x及俯角x度分別拋出,若兩者著地時間相差4秒且地點相距60m，則x為多少度?

[匿名]

回覆: 1

2015-09-24 1:31 pm

已知鐵容器A裝有10毫升的水；木容器B裝有20毫升的水；玻璃容器C裝有30毫升的水。若分別敲打容器A、B、C，則聲音由高到低排列分別為何?

用戶189857

回覆: 2

2015-09-14 11:10 am

喇叭如何在同一頻率發出不同音色?

[匿名]

回覆: 1

2015-09-07 3:09 am

About Young's double slit experiment?

[匿名]

回覆: 1

2015-09-05 9:04 am

Why E=mc2?

[匿名]

回覆: 2

2015-08-31 12:13 pm

About Gravitational Force?

[匿名]

回覆: 1

2015-08-31 3:58 am

Form Five Phy Gravitational force?

Dan

回覆: 2

2015-08-18 1:42 pm

物理:在旋轉圓盤上跳起的問題?

PING FAI

回覆: 2

2015-08-17 9:36 am

在欧姆定律, 當R常數較之前大時, V會怎樣?

Small potato

回覆: 2

2015-08-01 6:43 pm

Net force

Small potato

回覆: 2

2015-08-01 7:06 pm

Moment

Small potato

回覆: 1

2015-07-30 7:26 pm

Wave Problem

kaitai

回覆: 1

2015-07-30 9:02 am

中三物理熱學，光學問題

Ls

回覆: 2

2015-07-29 1:48 am

escape velocity

PING FAI

回覆: 1

2015-07-27 9:26 am

momentum and time

[匿名]

回覆: 1

2015-07-14 10:26 pm

急~~~交流電問題 (有 線圈 及 變壓器 )

Ka ho

回覆: 2

2015-07-06 9:01 am

Newton's first law