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1. ### Dog Grooming Services""Dog Grooming: Your Pup's Pampering & Happiness

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
3. ### Relationship between magnitude of current and magnetic field

hmm I don't really get it tho sorry:( can u look at my post 4?
4. ### Relationship between magnitude of current and magnetic field

hmmm sorry this Is how it looks like on my phone 😬
5. ### Relationship between magnitude of current and magnetic field

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
8. ### What happens when a conducting sphere rubs against metal?

I think there will not be a fixed charge on conducting material
9. ### What happens when a conducting sphere rubs against metal?

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?

12. ### How to find the heat energy produced in a resistor?

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)
13. ### What does it mean for an object to act as the "ground"?

that's the video I was watching..
14. ### What does it mean for an object to act as the "ground"?

they said that Y is acting as the ground, what does it mean?
15. ### Finding the potential difference between 2 points in a circuit

2V=5kohms 2kohms= 0.8V 3kohms=1.2V. p.d across P and Q= 1V-0.8V=0.2V is this explanation not sufficient ?
16. ### Finding the potential difference between 2 points in a circuit

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
17. ### Question about the inertia of logs in a pickup truck that stops suddenly

hello, did u miss my post 5?
18. ### Passengers in Sudden Plane Vertical Drop: Effects

hmm why not? if lift force decreases, then resultant force would be downwards no?
19. ### Passengers in Sudden Plane Vertical Drop: Effects

the lift force decreases ?
20. ### Question about the inertia of logs in a pickup truck that stops suddenly

but assuming they fall off, then the truck will become lighter, and assuming the driver doesn't slow down, won't the truck accelerate?
21. ### Passengers in Sudden Plane Vertical Drop: Effects

there's also lift;upward acting force, thrust; the forward acting force; and drag, the wind resistance
22. ### Passengers in Sudden Plane Vertical Drop: Effects

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

24. ### Passengers in Sudden Plane Vertical Drop: Effects

but the question didn't state the value of the acceleration of the plane
25. ### Passengers in Sudden Plane Vertical Drop: Effects

is it both? I think it's because when you're not moving, gravitational force will still act on you.
26. ### Passengers in Sudden Plane Vertical Drop: Effects

gravitational force
27. ### Passengers in Sudden Plane Vertical Drop: Effects

may I know the explanation?

nil
29. ### Direction of induced currents

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
30. ### A.C. generator -> why does the current reverse?

why does the current reverse when the coil is at this position in A.C generator ?
31. ### Can you use speed and velocity interchangeably?

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

33. ### Identifying which region in the conductor experiences a greater force

they are olevel questions
34. ### When an object is accelerating, does speed, velocity, or force change?

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?

36. ### Identifying which region of a conductor experiences the greater force

how are these 3 options different?
37. ### Identifying which region in the conductor experiences a greater force

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.
38. ### Identifying which region of a conductor experiences the greater force

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.
39. ### Why is the direction in which the D.C. motor turns reversed here?

in fig 6.2, A moves upwards while D moves downwards so doesn't it mean clockwise?
40. ### Why is the direction in which the D.C. motor turns reversed here?

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?
41. ### Resistance Differences: Nichrome vs. Copper Wire

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...
42. ### Is this the default set up of a DC motor?

oh I see it now thank you !
43. ### Is this the default set up of a DC motor?

^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?
44. ### Is it true that a phone uses more energy than a refrigerator?

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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46. ### Electromagnetism and the movement of particles

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?
47. ### Electromagnetism and the movement of particles

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?
48. ### Electromagnetism and the movement of particles

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...

50. ### Determining the north and south pole of a solenoid

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