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counterexample for boiling point: I saw that boiling point will increase because: more energy is required for the solvent's vapor pressure to reach the external pressure. counterexample for freezing point: Because of increasing the pressure, which prevents water molecules properly arranging...

nil

hmm I don't really get it tho sorry:( can u look at my post 4?

hmmm sorry this Is how it looks like on my phone 😬

then example if the "magnitude" of the 1st conductor has a bigger magnetic strength of 10 and the 2nd conductor is 5, so in the end they will exert a magnetic force of magnitude 5 on each other ?

nil

I think there will not be a fixed charge on conducting material

I know that metal is a "reservoir" of electrons, whereby electrons can flow out and in easily, so when conducting sphere is rubbed against metals, is there even a resulting charge on the conducting sphere?

then is the answer 4J?

why is answer for (6a)6J?

i found current to be 2/5 A. then 2/5A multipled by 6s = 2.4C. and since one joule per coulomb is equal to the unit of p.d, i get 2.4J. I don't get 4.8J(supposed answer)

that's the video I was watching..

they said that Y is acting as the ground, what does it mean?

2V=5kohms 2kohms= 0.8V 3kohms=1.2V. p.d across P and Q= 1V-0.8V=0.2V is this explanation not sufficient ?

is this method accepted? 2V is split equally between the 2 5kohms resistor because they are of equal resistance. 2V=5kohms 2kohms= 0.8V 3kohms=1.2V. p.d across P and Q= 1V-0.8V=0.2V

hello, did u miss my post 5?

hmm why not? if lift force decreases, then resultant force would be downwards no?

the lift force decreases ?

but assuming they fall off, then the truck will become lighter, and assuming the driver doesn't slow down, won't the truck accelerate?

there's also lift;upward acting force, thrust; the forward acting force; and drag, the wind resistance

but isn't gravitational force always acting on the plane? shouldn't the value of the acceleration be greater than acceleration due to gravity ?

but the question didn't state the value of the acceleration of the plane

is it both? I think it's because when you're not moving, gravitational force will still act on you.

gravitational force

may I know the explanation?

nil

I don't understand why they said that the induced current flow is opposite to each other when it clearly states direction is to the right for both? https://www.physicsforums.com/attachments/285900

why does the current reverse when the coil is at this position in A.C generator ?

how can you tell it's in a straight line ?

they are olevel questions

qn3: why is statement 2 the only answer? isn't speed one of the factors in velocity too? then shouldn't statement 1 be true too?

how are these 3 options different?

I feel that its M because as the conductor moves upwards, towards K, an equal but opposite force will be produced at M to pull the conductor downwards, but answer is K.

I feel that its M because as the conductor moves upwards, towards K, an equal but opposite force will be produced at M to pull the conductor downwards, but answer is K.

in fig 6.2, A moves upwards while D moves downwards so doesn't it mean clockwise?

in my worksheet, AB turns in clockwise direction , while in my textbook, it turns in the anti clockwise direction. so may I know why is this the case?

i don't understand the answer: Nichrome has a higher resistance than copper wire. There is a greater potential difference across the nichrome than the copper wire. From ,the resistance of nichrome is low enough such that there is significant power output. ^ i feel like the bold parts contradict...

oh I see it now thank you !

^because in my textbook, the set up doesn't even show the direction of dot/cross at points A/D, so we won't know the direction of current. then how are we supposed to use fleming's left hand rule to determine the direction of force?

perhaps? because according to the article, the thinner the wire used, the more thermal energy generated in the wire[according to the equation R=(ρ)x (ℓ/A) ], so I assumed since we usually use thinner wires to change our phones, it means our phones are consuming more energy than fridge (which...

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so in my diagram, the north and south poles are lying on the same plane as the dots and crosses that's why the cross/dot are not used to show field-direction?

how do you know when the cross/dot is used or not used to show field-direction? I saw note 2 already but how does it prove that the cross is not used to show field-direction?

yep I think they are. my reasoning is: a cross represents the magnetic field traveling into the plane of the paper, thus the index finger is pointing into the paper. then, the current is flowing from right to left(because the positive terminal of the battery is on the right while negative...

right, I meant like the label "W" On the compass, what do u call that though?