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10th math sample paper 2012

FIRST TERM EXAMINATION  MATHEMATICS(X)                                                             SECTION – A 1. State Euclid ’s division lemma. 2. If one zero of polynomial 5 x 2 +13 x + a   is reciprocal of the other, find the value of other. 3. In ΔABC, DE||BC meeting AB at D and AC at E. If AB/BD = 4and CE = 2 cm,     find the length of AE. 4. If 4 cotA = 3, find the value of (sinA- 4cos) / (sinA+ 4cos) 5.   Find the value of 4cot 2 θ − 4cos ec 2 θ . 6. Find the value of    sin 36 / 2cos54   -   2sec 41/3cos ec 49 7. Why is 11/30a non ‐ terminating decimal number? 8. Find he value of ‘k’ if following system of equations has no solutions: 3x-y-5=0 ; 6x-2y-k=0. 9. If cosA = 3/5, find 9cot 2 A −1. 10. The point of intersection of o gives is given by ( 20.5, 30.4). What is median ?                                                                                                                         SECTION – B 11. Is 7×5×3×2+3 a composite num

Force and Laws of Motion class 9 Physics Numerical

Q. 1.  A toy of mass 0.1kg acquires a spped of 5 m/s when pushed forward. Ahat is the impulse given to the toy? Q. 2.  A projectile weighing 200kg is fired from a gun with a velocity of 500m/s. If the velocity of recoil of the gun is 12.5m/s calculate the mass of the gun. Q. 3.  A car of mass 2500kg accelerates at the rate of 4m/s2 and then at the rate of 16 m/s2. Calculate t6he ratio of the forces exerted by the engine in the two cases. Q. 4.  A driver accelerates his car first at the rate of 1.8m/s2 and then at the rate of 1.2m/s2 calculate the ration of the forces exerted by the engines. Q. 5.  A body of mass 5 kg undergoes a change in speed from 30 to 40m/s . calculate its increase in momentum. Q. 6.  A body of mass 100g is moving with a velocity of 15m/s Find the momentum associated with the ball. Q. 7.  body of mass 5 kg is moving with a uniform velocity of 10m/s It is acted upon by a force of 20N What will be its velocity after 1s. Q. 8.  In order to g

Question Bank Forces and Laws of motion for class 9

9tt Forces and Laws of motion Q. 9. What do you mean by a force? Q. 10. Give an example of a balanced force. Q. 11. Can force change the shape of an object? Give an example to prove your point. Q. 12. Do action and reaction force react in the same direction? Q. 13. Why a moving ship does takes longer time as compared to a car when equal breaks are applied? Q. 14. Why are passengers through in forward direction when a running bus stops suddenly? Q. 15. Why do passengers tend to fall sideways when the bus takes a sharp u turn? Q. 16. Why should a passenger hold on to prevent himself from swaying in a turning bus? Q. 17. Why do passengers tend to fall back when it starts suddenly? Q. 18. Why do passengers jumping out of a rapidly moving bus fall forward with his face downwards, if he does not run forward? Q. 19. Why does a passenger jumping out of a rapidly moving bus fall forward with his face downwards? Q. 20. Why can dust be removed by shaking it, or beating it by a carpet

ctet science MCQ

1. Which one of the following constitutes the two best reasons for distinguishing the living from the non living? (a) Growth and locomotion (b) Irritability and locomotion (c) Respiration and excretion (d) Reproduction and locomotion C 2.The largest living bird is (a)duck (b’) dodo (c)ostrich (d) peacock C 3. Which of the following are the only mammals that possess nucleated red blood corpuscles? I.Camel 2.Llama 3.Man 4.Dog a) l and 2 (b) 2 and 3 (c )3 and 4 (d)l and4 A 4 When compared to the mammals, birds are less sensitive to temporary deprivation of water, be cause (1.A.S.1990) (a) urea excretion in mammals entails a greater loss of water than that in birds. (A’) the water requirement per unit weight is less in birds than in mamtnals. (c) absorption of water from the gut is more efficient in birds than in mammals. (d) None of these B 5. Birds get thrust (forward motion) and lift (upward motion) from (a) air sacs . b) flapping of wings (c) twisting