Ls

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回覆: 0

2018-04-10 12:16 am

Central force question?

Ls

回覆: 4

2018-03-27 9:45 am

Question about linear fictitious force, (link in the description)?

Ls

回覆: 1

2018-02-03 4:30 am

Question about water waves?

Ls

回覆: 1

2017-07-24 9:51 pm

To 天同知識長.....?

Ls

回覆: 2

2017-03-31 9:12 pm

help super urgent!!!!!!!!!!!!! physics about mirror?

Ls

回覆: 1

2017-03-30 12:19 pm

One physics MC about refraction, one MC about transformer, please help?

Ls

回覆: 2

2017-03-27 2:33 pm

Please help, why is the answer D? This is similar to the circuit question I asked before?

Ls

回覆: 1

2017-03-25 11:00 pm

one MC about circuit concept?

Ls

回覆: 1

2017-03-24 9:05 pm

Question about moment! please answer and help thanks?

Ls

回覆: 1

2017-03-24 1:32 am

Please help. One MC about wave and one about lens?

Ls

回覆: 1

2017-03-23 1:27 am

3 physics MC, Please help very urgent?

Ls

回覆: 1

2017-03-01 10:52 pm

why is the half life 80s ? is this question wrong?

Ls

回覆: 2

2017-02-08 12:06 am

Is this solution wrong?

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回覆: 1

2017-02-06 11:43 pm

Confusions about electrons as a wave. (A bit long and stupid. Thanks you so much for taking time to see)?

Ls

回覆: 2

2017-02-03 7:44 pm

Does work function in photoelectric changes with the voltage applied.?

Ls

回覆: 3

2017-01-02 1:08 pm

Simple question about wiring an AC ammeter?

Ls

回覆: 1

2016-12-26 3:17 pm

Question about gravitational force.?

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回覆: 1

2016-12-25 8:00 pm

Question about circular motion on a horizontal road?

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回覆: 2

2016-12-24 2:33 pm

A charge will experience a force when it travels in a magnetic field. By Newton 3rd law, what are the action and reaction pair?

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回覆: 2

2016-12-20 10:22 pm

Please prove that the lost of KE is the largest when it undergoes perfectly inelastic collision (stick together after collision)?

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回覆: 3

2016-12-16 12:01 am

my book said the force "push of table" acting on a book at rest on the table is a type of electro-magnetic force. Please explain.?

Ls

回覆: 1

2016-12-06 8:34 am

Please verify the answer.(Magnetism)?

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回覆: 1

2016-12-04 11:51 am

Re: EPE of a neutral object?

Ls

回覆: 2

2016-12-04 7:19 am

Please help. Big confusion about potential. Urgent.?

Ls

回覆: 1

2016-12-03 5:30 am

EPE of a neutral object?

Ls

回覆: 1

2016-12-03 4:47 am

Question about shuttle ball experiment. Very confused.?

Ls

回覆: 1

2016-12-01 3:21 am

Question about gold leaf electroscope.?

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回覆: 1

2016-12-01 3:09 am

Question about electrostatics.?

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回覆: 1

2016-11-27 8:48 am

I don't understand the answer of a) ,please explain what does p.d. drop increases mean.?

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回覆: 1

2016-11-22 3:46 pm

Question about current?

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回覆: 1

2016-11-22 2:21 pm

Please tell me if my approach to the answer is correct or not. The correct ans is E.?

Ls

回覆: 1

2016-11-21 1:20 pm

Please explain about (3)?

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回覆: 1

2016-11-13 1:15 pm

How can electrons be absorbed by material of the object in TEM microscope?

Ls

回覆: 1

2016-11-10 1:49 pm

Is this question wrong or impossible to answer? Why is the answer D?

Ls

回覆: 1

2016-11-10 1:45 pm

(transformer) why does iron loss in core doesn't affect voltage but copper loss in winding affect voltage?

Ls

回覆: 1

2016-11-05 6:19 pm

Re: photoelectrons having different speed.?

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回覆: 1

2016-11-05 1:04 pm

Question about x-ray, concept confusion?

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回覆: 1

2016-11-05 11:20 am

Explain why photoelectrons have different speed while their incident photons have fixed energy.?

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回覆: 2

2016-11-04 5:11 pm

Why (3) is not correct?isn't infrared produced? Isn't black body radiation produced?

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回覆: 1

2016-11-04 12:18 pm

Re: the question of brightness?

Ls

回覆: 1

2016-11-03 2:56 pm

Is brightness just related to the number of photons per time and independent of the photons' frequency?

Ls

回覆: 1

2016-11-03 2:13 pm

why cant electrons be excited by fast moving protons?

Ls

回覆: 1

2016-10-23 12:04 pm

How can nuclear fusion be uncontrolled? as there are no trigger like new nitrogens in fission?

Ls

回覆: 1

2016-10-23 11:55 am

Why does the sun have higher pressure in the core? Isn't the gravity increases linearly with the radius and highest pressure on the surface?

Ls

回覆: 1

2016-10-17 2:09 pm

Why KEmax=hf-work function?

Ls

回覆: 1

2016-10-14 1:12 pm

Physics. Why the water flow along the pipe will contribute pressure on the wall of the pipe which is parallel to the direction of flow?

Ls

回覆: 1

2016-10-14 1:06 pm

Will the speed of an electron convert to mass when it is near light speed?

Ls

回覆: 1

2016-10-11 5:09 pm

why cant heating speed up radioactivity rate?

Ls

回覆: 1

2016-10-11 3:04 pm

Question about photoelectric effect?

Ls

回覆: 1

2016-10-10 3:53 am

Consider a set up with a power supply(dc voltage) and a photocell (metal plate + collector) and an ammeter. Frequency of light is constant.?