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Physics: Post your doubts here!
fundamental wavelength =2L L = 1/2 lambda lambda = 2L V is constant both cases, so f1(lambda1) = f2(lambda2) (250)(2) = 0.8f f = 625 answer is 625 i had contacted many phds uni teachers and students they all agree with this answer -
Physics: Post your doubts here!
Since it is a velocity - Time graph when the spring is at its lowest and highest position the speed will be equal to zero because it stops for a moment in time to switch direction. The velocity is highest while traveling through the equilibrium position. So the answer will be either b or d... -
Physics: Post your doubts here!
which question of summer 2004? -
Physics: Post your doubts here!
for first question momentum is conserved no matter whether the collision is elastic or inelastic both bodies have same mass "m" total momentum before collision mv+m(0) since the second body is at rest since total momentum before collision equals total momentum after collision i.e mv let V2 be... -
Physics: Post your doubts here!
for question 2 E=V/d E=220/1.5*10^-2=1.4*10^4 f=ma f=VQ/d E=V/d therefore f=EQ f=ma ma=EQ a=EQ/m a=(1.4*10^4)*1.6*10^-19/(9.1*10^-31) charge of electron and mass of electron is written in book we should know these both a=2.5*10^15 part c(ii) v=d/t t=d/v t=0.12/5*10^7 t=2.4*10^-9 -
Physics: Post your doubts here!
emf means electricity generated from different forms of energy it depends upon the source in this case it is chemical energy chemical energy wont change unless u reduce the chemical energy emf wont change.. potential difference means electricity converted into different forms of energy... -
Physics: Post your doubts here!
for q 12 the distance of block from the level of head of the man is 18m and when to level the head with the block man travels 9m upwards and block 9m downwards. tension acts towards the pulley and the weight acts opposite to tension i.e downwards. force acting in the direction of acceleration is... -
Physics: Post your doubts here!
dear i have answer q8 already i am goin to answer 11 just in a minute -
Physics: Post your doubts here!
x=ut+1/2(at^2) we know that motion started from rest so u=0 x=1/2(at^2) l=1/2(gt^2) equation 1 if t=0.5 1/2g(0.5t)^2 0.5*g*0.25t^2 equation 2 comparing equation 1 and 2 we get 0.25l as 0.25 will cut each other at both ends and we will get our original equation 1 hope u understand -
Physics: Post your doubts here!
for first part for destructive interference waves phase difference between the two waves should be 180 or we can say that they are out of phase by 180 thats how complete destructive interference occurs. for second condition these waves must have same amplitude and same frequency so that to form... -
Physics: Post your doubts here!
U THINK IF SOMEONE WOULD SOLVE ALL 40QUESTIONS FOR U THEN STOP DREAMING JUST POST THE QUESTIONS THAT U THINK U CANT SOLVE -
Mathematics: Post your doubts here!
IS THIS IN AS? OR IS IT A2 -
Mathematics: Post your doubts here!
two decorations are suspended between the wall and ceiling using light strings AP PQ and QC the strings AP QP and CQare respectively at 30 60 and theta to the vertical the decorations hanging in equilibrium from p and q have weight 4N and 3N respectively. (a)by considering the equilibrium of... -
Physics: Post your doubts here!
no why complicate things when u can solve them by a simpler version -
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Physics: Post your doubts here!
the distance of block from the level of head of the man is 18m and when to level the head with the block man travels 9m upwards and block 9m downwards. tension acts towards the pulley and the weight acts opposite to tension i.e downwards. force acting in the direction of acceleration is... -
Physics: Post your doubts here!
redspot is for singaporeans and there are mistakes i just want past paper unsolved -
Physics: Post your doubts here!
are there topical past papers for physics i want for electricity?? -
Physics: Post your doubts here!
now to find the phase difference draw two vertical lines from one wave form to the other remember it should be perpendicular to the x axis 4s means one wave of waveform Q 4.5 means one wave of waveformP 9s means two waves of waveform Q draw the lines and see what u get at 4 s u will see 0 phase...