CBSE Area

Choosing your career is an important step because your future is at stake. It is generally observed that a large section of students are unaware of what they want to achieve in life. This amounts to a situation like boarding a train without knowing one's destination. Undoubtedly it may result in waste of precious time as well as money. This underscores the need for setting a meaningful and attainable goal. In taking such a decision one must keep in mind one's qualification, interests, knowledge, experience, if any, attitude, potentialities, and existing trends in the job market. Knowing your weakness and strength enables you to set a meaningful and attainable goal. The following guidelines may prove useful in making your career a success. While academic merit is generally pivotal in making an entry into any career an individual's level of understanding, his application of knowledge and professional training are necessary. Personality and even one's outlook towar...

1. An airplane accelerates down a runway at 3.20 m/s2 for 32.8 s until is finally lifts off the ground. Determine the distance traveled before takeoff. 2. A car starts from rest and accelerates uniformly over a time of 5.21 seconds for a distance of 110 m. Determine the acceleration of the car. 3. Upton Chuck is riding the Giant Drop at Great America. If Upton free falls for 2.6 seconds, what will be his final velocity and how far will he fall? 4. A race car accelerates uniformly from 18.5 m/s to 46.1 m/s in 2.47 seconds. Determine the acceleration of the car and the distance traveled. 5. A feather is dropped on the moon from a height of 1.40 meters. The acceleration of gravity on the moon is 1.67 m/s2. Determine the time for the feather to fall to the surface of the moon. 6. Rocket-powered sleds are used to test the human response to acceleration. If a rocket-powered sled is accelerated to a speed of 444 m/s in 1.8 seconds, then what is the acceleration and what is the distance that t...

      9 th  SA-2 Solved Practice paper [Physics and Chem istry] 2014 1. Name the anion and cation which constitute the molecule of magnesium oxide   [1] 2. A cube of side 5cm is immersed in water and then in saturated salt solution. In which case will it experience a greater buoyant force. If each side of the cube is reduced to 4cm and then immersed in water compare the force experienced by the cube, as compared to the first case. Give reasons for each case. 2 3. The kinetic energy of an object of mass `m� moving with a velocity of 5ms-1 is 25J. Calculate its kinetic energy when its velocity is doubled. 2 4. The percentage of three elements calcium, carbon and oxygen in a sample of calcium carbonate is given as : [3] Calcium =40% ; Carbon =12.0% ; Oxygen = 48% If the law of constant proportion is true, what weights of these elements will be present in 1.5 g of another sample of calcium. Carbonate ? (Atomic mass of Ca = 40 u , C =...