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Motion questions

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CBSE ADDA Q. 1. When the passenger m oving in a bus , the road side trees appear to b e moving ---------------------------------- (a) Back ward (b)For ward  Q. 2. In uniform motion the object covers ------------ (a) equel distance (b) un equal distance  Q. 3. Where objects cover un equal distances in equal interval of time then the motion is called ---------------- (a) uniform motion (b) non uniform motion  Q. 4. The average speed = =A car accelerate = (a) Total time taken /total distance traveled (b) Total distance traveled/total time taken  Q. 5. v = (a) t/s (b) s/t Q. 6. An object travels 16m in 4sec and another 16 m in 2 sec. what is the average speed of the object----------- (a) 5.33 ms-1 (b) 5. 34 ms-1  Q. 7. If we specify , its direction of motion along with its speed , the quantity that specifies with the aspects is called------------- (a) velocity (b) motion  Q. 8. Automobiles are fitted with a device that show the distance traveled . such a device is known ---------
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CBSE Class IX Maths chapter Plolynomials Guess Questions papers

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Chapter 2 Polynomials class9  Practice Questions Paper Important Identities : - 1. ( x + y )2 = x2 + 2xy +y2 2. ( x – y)2 = x2 – 2xy + y2 3. (x + y)(x – y) = x2 – y2 4. (x + a)(x + b) = x2 +(a + b)x + ab 5. (x + y)3  = x3 + 3x2y + 3xy2 + y3  = x3 + y3 +3xy(x +y) 6. (x - y)3 = x3 - 3x2y + 3xy2 - y3  = x3+ y3 -3xy(x -y) 7. (x + y + z)2 = x2 + y2 + z2 + 2xy + 2yz + 2zx 8. x3 + y3 = (x + y)(x2 – xy + y2) x3 - y3 = (x - y)(x2 + xy + y2) 9. x3 + y3 + z3 – 3xyz = (x + y + z)(x2 + y2 + z2 – xy – yz – zx) 10. If x + y + z = 0 , then x3 + y3 + z3 = 3xyz 1. Classify the following as monomials, binomials and trinomials : (a)x3          b) 2y2 – 4y + 3  c) t2 – 4  d) √2 e) x3 + 4x2 + 5x f) u7 + u2 – 4. 2. Write the coefficients of x2 in each of the following : a) 3x^2 – 4y  b) x + x^2 + 7y  c) 3x + 4y – 5z d) x^2 + 2xy + 3y^2 3.
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Who Discovered Electricity

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CBSE ADDA The history of electricity goes back more than two thousand years, to the time the Ancient Greeks discovered that rubbing fur on amber caused an attraction between the two. By the 17th century, many electricity-related discoveries had been made, such as the invention of an early electrostatic generator, the differentiation between positive and negative currents, and the classification of materials as conductors or insulators. In the year 1600, English physician William Gilbert conned the term electric, from the Greek elektron, to identify the force that certain substances exert when rubbed against each other. While many believe Benjamin Franklin to be the father of electricity, current findings seem to show otherwise. In 1752, Franklin is said to have performed the famous experiment of flying a kite during a thunderstorm, which led to the discovery that lightning and electricity were somehow related. Modern scientists know this to be something of a tall tale, since being h
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CBSE ADDA:Ch. Motion Multiple choice Questions Class 09 Physics

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Q. 1.  When the passenger m oving in a bus , the road side trees appear to b e moving ---------------------------------- (a) Back ward (b)For ward Q. 2.  In uniform   motion the object covers ------------ (a) equel distance (b) un equal distance Q. 3.  Where objects cover un equal distances in equal interval of time then the motion is called ---------------- (a) uniform motion (b) non uniform motion Q. 4.  The average speed = =A car accelerate = (a) Total time taken /total distance traveled (b) Total distance traveled/total time taken Q. 5.  v = (a) t/s (b) s/t Q. 6.  An object travels 16m in 4sec and another   16 m   in 2 sec. what is the average speed of the object----------- (a) 5.33 ms-1 (b) 5. 34 ms-1 Q. 7.  If we specify , its direction of motion along with its speed , the quantity that specifies with the aspects is called------------- (a) velocity (b) motion Q. 8.  A
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