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11. A person blows into open-end of a long pipe. As a result, a high-pressure pulse of air travels down the pipe. When this pulse reaches the other end of the pipe, (A) a high-pressure pulse starts traveling up the pipe, if t ...
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The number of real roots of x8-x5+x2-x+1=0 is? a] 2 b] 4 c] 6 d] 0 ...
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If α be the number of solns of the equation [sin x]=|x|, (where [.] represents greatest integer function) and m be the greatest value of cos(x2+xex-[x]) in the interval [-1,1], then what is the relation between α and m (α ...
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A cylinder of radius R made of a material of thermal conductivity 7 is surrounded by a cylindrical shell of inner radius R and outer radius 2R. The shell is made of a material of thermal conductivity 3. The two ends of the co ...
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In a test an examinee either guesses or copies or knows the answer to a multiple choice question with 4 choices. The probability that he makes a guess is 1/3 and the probability that he copies it is 1/6 . The probability that ...
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Find eccentricity of the conic given by the equation y= x - 1/x ? ...
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In a multiple choice question there are four alternative answers, of which one or more are correct. a candidate will get marks in the question only if he ticks all the correct answers. The candidate decides to tick the answer ...
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A cylinder of radius R made of a material of thermal conductivity 7 is surrounded by a cylindrical shell of inner radius R and outer radius 2R. The shell is made of a material of thermal conductivity 3. The two ends of the co ...
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1)Find the value of \fn_jvn \frac{\sum_{r=0}^{24}\binom{100}{r}\binom{100}{4r+2}}{\sum_{r=1}^{25}\binom{200}{8r-6}} 2)The largest term of the sequence 1/503 , 4/524 , 9/581 , 16/692 ... is 49/1529p Find p? 3)No of solutions o ...
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I know something is wrong in the following proofs.Can't figure out which step is wrong. Proof of -1 =1: *Image* Proof of 1=3: *Image* ...
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A man stands on the top of a high building with a source of sound with frequency 1000 Hz.He accidently drops the device.Find the frequency of the sound heard by the man 4 seconds after he drops the device?(Speed of sound=320 ...
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A man stands on the top of a high building with a source of sound with frequency 1000 Hz.He accidently drops the device.Find the frequency of the sound heard by the man 4 seconds after he drops the device?(Speed of sound=320 ...
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If the acceleration of an object is zero, are no forces acting on it? Explain. ...
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What would your bathroom scale read if you weighed yourself on an inclined plane? ...
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\hspace{-16}$How many digits are used in total to write the natural numbers \\\\ from $\bf{1}$ to $\bf{100 ^ {1000}.}$ ...
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\hspace{-16}$How many digits are used in total to write the natural numbers \\\\ from $\bf{1}$ to $\bf{100 ^ {1000}.}$ ...
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A train goes around a circle, the first time with an average velocity of 100 km/h. How fast should the train be when going around the circle again a second time, so that the average velocity over the two loops is 200 km/h? ...
