- #1
guinsooms
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Hi all.
I am a student taking A levels, I was hoping the forumites here could help me answer some doubts that I have regarding the concepts above.
1) Waves
It was mentioned that the distances between resonances are half a wavelength.
For example, in a water tube with a sound source above the water, the first point of resonance is x. The next point of resonance is x + λ/2. How is this expression derived?
2) Circuits
Why there no potential drop when no current flows? Quantitatively this holds true, but how you understand it qualitatively?
3) Circuits
In the most simplified sense, how you do understand Kirchkoff's Laws of Circuits and what are its implications on the circuit equations?
4) Circuits
In a galvanometer circuit (one where a rod with resistance is used to measure the emf on an unknown source), why doesn't current flow between the primary and the secondary circuit when their potentials are similar?
5) Thermal Physics
How exactly do you use a thermocouple to measure temperature, and what will be its implications on this equation: [PLAIN]http://www.s-cool.co.uk/a-level/assets/learn_its/alevel/physics/temperature-and-thermal-properties/introduction-to-temperature/eqn.jpg
6) Thermal Physics
Out of curiosity, why is the triple point of water 0.01 degrees celsius, and not 0.00?
7) Thermal Physics
For internal energy, why don't we include macro KE / PE? By the name, I can accept this, but are there any other analogies to help me understand this exclusion?
8) Thermal Physics
For potential energy, wikipedia defines it as energy stored in a body or in a system due to its position in a force field or due to its configuration.
For boiling, it was mentioned that energy has to be supplied to the system in order to raise the potential energy. I'm thinking that when the molecules are further away, they will have more tendency to attract each other, and hence potential energy will rise, similar to that of gravitational potential energy.
9) Electromagnetism
For motional EMI using a rod / solenoid, E = Blv. Why do you say that the rod / solenoid behaves like an emf source?
Had an early version of my questions, but got deleted because I was timed out >:(
Hope you could answer my questions and provide your take on the issues!
Thank you,
guinsooms
I am a student taking A levels, I was hoping the forumites here could help me answer some doubts that I have regarding the concepts above.
1) Waves
It was mentioned that the distances between resonances are half a wavelength.
For example, in a water tube with a sound source above the water, the first point of resonance is x. The next point of resonance is x + λ/2. How is this expression derived?
2) Circuits
Why there no potential drop when no current flows? Quantitatively this holds true, but how you understand it qualitatively?
3) Circuits
In the most simplified sense, how you do understand Kirchkoff's Laws of Circuits and what are its implications on the circuit equations?
4) Circuits
In a galvanometer circuit (one where a rod with resistance is used to measure the emf on an unknown source), why doesn't current flow between the primary and the secondary circuit when their potentials are similar?
5) Thermal Physics
How exactly do you use a thermocouple to measure temperature, and what will be its implications on this equation: [PLAIN]http://www.s-cool.co.uk/a-level/assets/learn_its/alevel/physics/temperature-and-thermal-properties/introduction-to-temperature/eqn.jpg
6) Thermal Physics
Out of curiosity, why is the triple point of water 0.01 degrees celsius, and not 0.00?
7) Thermal Physics
For internal energy, why don't we include macro KE / PE? By the name, I can accept this, but are there any other analogies to help me understand this exclusion?
8) Thermal Physics
For potential energy, wikipedia defines it as energy stored in a body or in a system due to its position in a force field or due to its configuration.
For boiling, it was mentioned that energy has to be supplied to the system in order to raise the potential energy. I'm thinking that when the molecules are further away, they will have more tendency to attract each other, and hence potential energy will rise, similar to that of gravitational potential energy.
9) Electromagnetism
For motional EMI using a rod / solenoid, E = Blv. Why do you say that the rod / solenoid behaves like an emf source?
Had an early version of my questions, but got deleted because I was timed out >:(
Hope you could answer my questions and provide your take on the issues!
Thank you,
guinsooms
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