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Pluto has mean diameter of 2,300 km and very eccentric orbit (oval shaped) around the Sun, with a perihelion (nearest) distance of 4.4 × 109 km and an aphelion (farthest) distance of 7.3 × 109 km. What are the respective solid angles subtended by Pluto from Earth’s perspective? Assume that distance from the Sun can be neglected.

 Pluto has mean diameter of 2,300 km and very eccentric orbit (oval shaped) around the Sun, with a perihelion (nearest) distance of 4.4 × 109 km and an aphelion (farthest) distance of 7.3 × 109 km. What are the respective solid angles subtended by Pluto from Earth’s perspective? Assume that distance from the Sun can be neglected. 




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A weather forecasting plastic balloon of volume 15 m3 contains hydrogen of density 0.09 kg M-3. The volume of an equipment carried by the balloon is negligible compared to its own volume. The mass of empty balloon alone is 7.15 kg. The balloon is floating in air of density 1.3 kg M-3. Calculate : (i) the mass of hydrogen in the balloon, (ii) the mass of hydrogen and balloon, (iii) the total mass of hydrogen, balloon and equipment if the mass of equipment is x kg, (iv) the mass of air displaced by balloon and (v) the mass of equipment using the law of floatation.

 A weather forecasting plastic balloon of volume 15 m3 contains hydrogen of density 0.09 kg M-3. The volume of an equipment carried by the balloon is negligible compared to its own volume. The mass of empty balloon alone is 7.15 kg. The balloon is floating in air of density 1.3 kg M-3. Calculate : (i) the mass of hydrogen in the balloon, (ii) the mass of hydrogen and balloon, (iii) the total mass of hydrogen, balloon and equipment if the mass of equipment is x kg, (iv) the mass of air displaced by balloon and (v) the mass of equipment using the law of floatation. 



































MAHARASHTRA BOARD COMPUTER SCIENCE SYLLABUS CLASS 11 CLASS 12 bifocal HSC

 MAHARASHTRA BOARD COMPUTER SCIENCE SYLLABUS CLASS 11 CLASS 12 bifocal HSC








ICSE CLASS 9 CONCISE MATHEMATICS CHAPTERWISE SELINA | CONCEPTS EXAMPLES SOLUTIONS

 ICSE CLASS 9 CONCISE MATHEMATICS SELINA |  CHAPTERWISE CONCEPTS SOLUTIONS 




Chapter 1 Rational and Irrational Numbers
https://youtube.com/playlist?list=PLOHzPnwPA5lob5xoyb9PBROs0S5Sqm7d6

Chapter 2/3 Compound Interest [With/Without Using Formula]
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Chapter 4 Expansions
https://youtube.com/playlist?list=PLOHzPnwPA5lpuFenrnusiwF9LWmue0Cao

Chapter 5 Factorisation
https://youtube.com/playlist?list=PLOHzPnwPA5lqTd4VfyV1T2GyGn-3udmch


CHAP 6 Solving Simultaneous Linear Equation CLASS 9 ICSE


CHAP 7 INDICES EXPONENTS ICSE class 9


Chap 8 Logarithms icse class 9 
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Chapter 9/10 Triangles/Isosceles Triangles
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Chap 13 pythagoras theorem class 9 icse



Chapter 15 Construction of Polygons
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Chap 16 area of parallelogram icse class 9


Chap 17 class 9 circles icse 
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Chapter 18,19 Statistics/Mean Median
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CHAP 20 CLASS 9 ICSE Area And Perimeter


Chap 26 coordinate class 9 icse

Chapter 27 – Graphical Solution
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ICSE CLASS 10 SOLUTIONS MATHS:
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