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A2 Physics | Post your doubts here
I believe you're mistakenly describing omega for angular displacement, in the bus ride, the angular displacement changes constantly not the omega... The omega changes in the beginning of the ride when the bus starts to move... After that it becomes constant as far as I'm concerned and thus the... -
A2 Physics | Post your doubts here
To identify the magnetic field of a wire, you should use fleming's right hand grip rule. There: http://sciencecity.oupchina.com.hk/npaw/student/glossary/right_hand_grip_rule.htm Notice that the field of Y is actually coming out of the paper on wire X in it's circular shape. By using... -
A2 Physics | Post your doubts here
Look bro, centripetal acceleration causes body to move in a circle, the angular velocity is ONLY a property of circular motion. This is the whole problem. It's quiet the opposite! If the angular velocity actually changes and the force remains the same, then the radius would constantly... -
A2 Physics | Post your doubts here
Sorry dude this is still wrong. On a more general look, you're basically saying that if an object is moving in a circle with a constant angular velocity it requires no force to keep it moving that way, which is wrong on all concepts. Furthermore, you said " When the velocity is constant... -
Physics: Post your doubts here!
Please copy the exam link next time... If your question is the one about magnetic fields, then: i) Since you have moving electrons ( moving charges ) therefore you have a current. As you have a magnetic field perpendicular to the direction of this current, therefore there will be a force... -
A2 Physics | Post your doubts here
This is exactly what I am saying. Friction in itself is a reaction force. It is caused by both the weight of the body ( The reaction of the weight to be specific ) and the force causing it's motion ( The moving plate ). Keep in mind however that there is something called the centrifugal force... -
Physics: Post your doubts here!
Alright sorry for the late reply. ; ) Q1: I honestly don't know how to solve it by using the triangle of forces... But I do know how to do so with resolution: Since the object is in equilibrium, therefore sum of horizontal forces equals zero and some of vertical forces equals zero as well... -
A2 Physics | Post your doubts here
Since you guys didn't know the answer as well. Check mine. ; ) -
A2 Physics | Post your doubts here
It's is the acceleration due to gravity you're right. Anywho, in simple harmonic motion, acceleration is directly proportional to displacement. In this question, the acceleration of the ball is constant since the ball moves by it's constant component of weight. Therefore this is not simple... -
Physics: Post your doubts here!
I'll answer both of your questions tomorrow inshaAllah since it's pretty late in here. Sorry about that. : / -
Physics: Post your doubts here!
Well the microphone is actually made of piezo electric stuff as far as I know. o_O Well first of all, use the same sound source (e.g. speaker) for all measurements with the same sound level. Furthermore, keep the distance between the sound source and the glass constant. -
Physics: Post your doubts here!
The microphone is what is connected to the C.R.O. and not the glass itself. xD -
Physics: Post your doubts here!
Well I can give you some details that my teacher said about this. The idea is that you want to measure the sound beyond the glass when the pressure is varied. To do this, you need to cover the air outlet with a vacuum pump ( to vary the pressure ) and a pressure gauge ( to measure the pressure... -
Physics: Post your doubts here!
15) The idea of this question is simply energy conservation. When compressed, the spring had a certain elastic potential energy that changes to the kinetic energies of the two cars once released. So you just need to find the kinetic energies of the two cars. However, you only got the speed of 1... -
Physics: Post your doubts here!
Sorry for the late reply bro. ; ) 14) This is actually a very tricky question. However, if we call the initial speed of the projectile V1 and the speed at the highest point V2, we'll find that V2 = V1 cos45. Why? In a projectile motion there is only a vertical acceleration, meaning that the... -
Physics: Post your doubts here!
Oh shoot I thought it's a lamp. xD Anyway it's pretty much the same. I didn't say the resistance is zero in the lamp, I said in the wire. You know when you connect a wire and a lamp for instance parallel to each other, the lamp will not light. In our example, if you remove the variable... -
Physics: Post your doubts here!
Thanks for the reply. And damn that text is foxy! :p I don't have microsoft word 2010 unfortunately so I'll just keep replying in the "old fashion" way. :p -
Physics: Post your doubts here!
You're welcome! :D Well you got it right. But if they're not the same, I honestly am not sure what to do. The question didn't put any marks for that as far as I can remember. But your solution of repeating with different distances isn't really going to fix it since the problem is not with the... -
Physics: Post your doubts here!
Umm no, check this lil drawing that I've made. : ) -
Physics: Post your doubts here!
Ok look, if the first answer is the correct one ( which is the more probable ) then my explanation would make sense. What did the question ask for? It asked for a "deduction". In the question he said that the density of P is greater than that of Q. This means that the answer C is pretty much...