Questions asked by Agniv

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• Two tuning forks a and b of frequency 200 hz and 200 hz are vibrated simultaneously. Then the ratio of time taken by the sound a and b to travel 660m and 490m respectively in air is ?
  
• Two tuning forks a and b of frequency 200 Hz and 400 Hz are vibrated simultaneously. speed of sound in air is 330 m/s. Then the ratio of time taken by the sound a and b to travel 660 m and 490 m respectively in air is ?
  
• Ripples are produced on water surface in a bucket. the separation between consecutive crests is mm and the ripples produced on surface at a speed of 2 cm per second. How many crests hit the wall of the container per second ?
  
• What is the angle between wave velocity and particle velocity of a longitudinal wave ?
  
• The frequency of a tuning fork is 384 per second and velocity of sound in air is 352 m/s. How far the sound has traveled while the fork completes 36 vibrations ?
  
• The sound level at a point is increased by 30 decibels. By what factor is the amplitude increased ?
  
• A man speaks the truth 3 out of 4 times. He rolls a dice and reports that the outcome is 6. What is the probability that the number is actually 6 ?
  
• A ball is dropped from a balloon going up at a speed of 7 m/s. If the balloon was at a height of 60 m at the time of dropping the ball, how long will the ball take in reaching the ground and what will be its displacement ?
  
• A balloon filled with a lighter gas occupies a volume of 1500 cu metre. Its mass (mass of material of balloon + mass of gas in it) is 1650 kg. Its tied with a rope and floating in air of density 1.3 kg/cubic metre. The pull on the rope is ?
  
• In the figure, each resistance is of 10 ohms. The equivalent resistance between P and R is ?
  
• P(x) is a polynomial of degree more than 2 when p(x) is divided by x-2 it leaves a remainder 1 and when it is divided by x-3 it leaves a remainder 3. Find the remainder when p)x) is divided by(x-2)(x-3) ?