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What happened to the centre state relations when different parties ruled at the centre and state levels till 1990? -civics-class 10-cbse1 AnswerFor the stability of a floating body the 3 AnswerConstruct tangents to each circle from the centre of the other circle. Mathematics CBSE class 10 20151 AnswerIn a tropical cyclone over the Pacific Ocean, surface pressure at 500 km from the cyclone centre is 1000 hPa. Surface pressure at the centre is 900 hPa. Sea surface temperature and surface air temperature remain constant at 28oC and 27oC, respectively. Difference in potential temperature between 500 km and cyclone centre is __________ K. (Give the answer to two decimal places.) Take g = 9.8 m s–2, Cp = 1005 J kg–1 K–1, gas constant R = 287 J kg–1 K–10 AnswerHow do state or regional political parties contribute in strengthening federalism and democracy of India? Explain with examples.-cbse-civics-class10-20121 AnswerWhy, despite the implementation of green revolution, 65 per cent of our population continued to be engaged in the agriculture sector till 1990? -Economics CBSE class 11 ncert1 AnswerA coal seam lying at a depth of 200 m is developed by bord and pillar method. Pillars are 30 m centre to centre with a gallery width of 4 m. Unit weight of the overlying strata is 28 kN/m3. If the pillar strength is 9.32 MPa, the factor of safety of pillar is ____________.0 AnswerIn the Fig PQ is a tangent at a point C to a circle with centre O. if AB is a diameter and ∠CAB = 30°, find ∠PCA. Mathematics CBSE class 10 20161 AnswerA force of 100 N is applied to the centre of a circular disc, of mass 10 kg and radius 1 m, resting on a floor as shown in the figure. If the disc rolls without slipping on the floor, the linear acceleration (in m/s2) of the centre of the disc is ________ (correct to two decimal places).0 AnswerA hoop of radius r and mass m rotating with an angular velocity ω0 is placed on a rough horizontal surface. The initial velocity of the centre of the hoop is zero. What will be the velocity of the centre of the hoop when it ceases to slip ? - physics 20131 AnswerWhat do you mean by secular state ? Give any two provisions that make India a secular state ? -civics-class 10-cbse1 AnswerWhat are trophic levels? Give an example of a food chain and state the different trophic levels in it.-CBSE Physics 1 AnswerIn the given figure, O is centre of the circle with AC = 24 cm, AB = 7 cm and ∠BOD = 90°. Find the area of the shaded region. Mathematics CBSE class 10 20171 AnswerAn object of height 4.0 cm is placed at a distance of 30 cm from the optical centre ‘O’ of a convex lens of focal length 20 cm. Draw a ray diagram to find the position and size of the image formed. Mark optical centre ‘O’ and principal focus ‘F’ on the diagram. Also find the approximate ratio of size of the image to the size of the object.0 AnswerIn a circle of radius 21 cm, an arc subtends an angle of 60 degree at the centre. Find: Mathematics CBSE class 10 20132 AnswerExplain the menstrual phase in a human female. State the levels of ovarian and pituitary hormones during this phase. cbse-Biology-class-121 AnswerIn the given figure, two concentric circles with centre O have radii 21 cm and 42 cm. If ∠AOB = 60°, find the area of the shaded region.Mathematics CBSE class 10 20171 Answer What is the direction of magnetic field at the centre of a current carrying circular loop ? -2007 CBSE Physic class 101 AnswerIn the given figure, XY and X’Y’ are two parallel tangents to a circle with centre O and another tangents AB with point of contact C, is intersecting XY at A and X’Y’ at B. Prove that ∠AOB = 90°. Mathematics CBSE class 10 20171 AnswerIn an aircraft, elevator control effectiveness determines GATE-Aerospace Engineering-Question-20121 Answer