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Q9Q9 with proper explanation cuz i dont know what it is asking.
For Q26 why cant D be correct cuz at antinodes displacement is maximum ....???
A ball is kicked towards goal posts from a position 20m from and directly in front of the posts. The ball takes 0.60 s from the time it is kicked to pass over the cross-bar, 2.5 m above the ground. The ball is at its maximum height as it passes over the cross bar. You may ignore the air resistance
a) Calculate the horizontal component of the ball's velocity
i get the same ans but in ms its 2.5/0.6 = 4.1720/0.6=33.3 m/s
i get the same ans but in ms its 2.5/0.6 = 4.17
Assuming that you're facing a problem in part (a), the lowest wavelength photon would be emitted when an electron makes a transition from the ground state to "zero" level.pls solve this
i am confused that why are we using the zero level? why not the transition from -1.56 eV to -10.43eVAssuming that you're facing a problem in part (a), the lowest wavelength photon would be emitted when an electron makes a transition from the ground state to "zero" level.
Because that is the Maximum Energy change we can get. According to E=hf max energy means maximum frequency, so minimum wavelength. Got it?i am confused that why are we using the zero level? why not the transition from -1.56 eV to -10.43eV
No, it isn't related to Centripetal force - you're not expected to know about it in an AS Level paper. B should be the answer, because that is the resultant of normal force and friction force on the tyre. Force of friction is in the same direction as car's motion because the tyre must be rotating in a clockwise direction.http://www.xtremepapers.com/CIE/International A And AS Level/9702 - Physics/9702_w07_qp_1.pdf
Can anyone please explain Q 11 of this paper? Does the answer have anything to do with centripetal force?
Q4
Yes,http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w09_qp_12.pdf
Q11
For Q23 answer is B cuz speed of light in vacuum is constant.Is my reasoning correct or is their any other reason?
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