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Showing posts with label ICSE. Show all posts

ICSE CLASS 10 PHYSICS CHAPTERWISE YOUTUBE PLAYLISTS | NUMERICALS CONCEPTS

 ICSE CLASS 10 PHYSICS CHAPTERWISE YOUTUBE PLAYLISTs 

















This contains:
Chapter 4 Refraction of Light at Plane Surfaces
Chapter 5 Refraction through a Lens
Chapter 6 Spectrum

Chapter 7 Sound

This contains:
Chapter 8 Current Electricity
Chapter 9 Household Circuits






TIPS TO SCORE WELL ICSE CLASS 10 COMPUTER APPLICATIONS

 TIPS TO SCORE WELL 

ICSE CLASS 10 COMPUTER APPLICATIONS



SYLLABUS / PASTPAPERS / SPECIMEN PAPER LINK 












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(a+b+c)2=a2+b2+c2+2ab+2bc+2ca verify example prove compute how to factorise identity expansion proof

 

 (a+b+c)2=a2+b2+c2+2ab+2bc+2ca verify example prove compute how to factorise identity expansion proof


 

 

 

 

 


 

 PDFNOTES

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 tags: (a+b+c)^2 identity formula expansion proof (a+b+c)2=a2+b2+c2+2ab+2bc+2ca verify example prove compute ow to factorise using the identity (a+b+c)^2=a^2+b^2+c^2+2ab+2bc+2ca SOME IMPORTANT MATHEMATICAL FORMULAE Express Square of a Trinomial Solve Algebraic Formulas for Class 9 – Basic Concepts and Identities Proofs, Examples, FAQs - Class 9 Maths Lab Manual identity Standard Algebraic Identities with Examples Algebraic Identity Derivation Activity How to expand using the identity ''(x+a)(x+b)=x2+(a+b)x+ab all formulas of expansion class 9 expansions in maths class 9 math class 9 algebra algebraic identities for class 8 activities expansion using special algebraic identities algebraic identities project Formulas, Tricks for Solving Quadratic Equations CBSE Class 9 Maths Chapter 2 Polynomial Notes Polynomials L4 | CBSE Class 9 Maths Chapter 2 NCERT ICSE 9 Maths | Expansions | Expansions. ICSE Class 9 Maths Chapter 4 Selina CONCISE MATHEMATICS Solutions EXPANSIONS CHAPTER | CBSE NCERT Polynomials Class 9 Extra Questions Maths Chapter 2 || Important Formulas Important Questions Solved Examples Algebraic identities NCERT Exemplar class 9 maths chapter 3 polynomials solutions chapter 3 polynomials class 9 worksheet class 9 maths chapter 3 maharashtra board polynomials class 9 pdf state board Practice Set CHAPTER 3 NOTES mcq pdf extra questions solutions worksheet with answers CONCEPTS Worksheet extra questions with answers | class 9 polynomials solutions chapter 2 polynomials class 9 worksheet polynomials class 9 textbook pdf polynomials class 9 solutions pdf polynomials class 9 pdf notes polynomials class 9 mcq polynomials class 9 worksheet pdf polynomials class 9 notes The concepts are good for Class 9, Class 10 ICSE CBSE BOARDS students or those appearing for competitive exams like maths olympiads, banking, nda, data science, mba, cat, etc. splitting the middle term class 9 polynomials polynomials class 9 ex 2.1 division of polynomials class 9 polynomials class 9 ex 2.2 polynomials class 9 ex 2.4 polynomials class 9 ex 2.5 polynomials class 9 factorisation of polynomials class 9 class 9 polynomials factor theorem polynomials class 9

HOW TO SOLVE SURDS CLASS 9 ICSE CBSE WORKSHEET WITH ANSWERS

 

 HOW TO SOLVE SURDS CLASS 9 ICSE CBSE WORKSHEET WITH ANSWERS

 
 
 
 
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SELINA CHAPTER 25 SOLUTIONS_ EX 20B , 20C PROBABILITY

 SELINA CHAPTER 25 SOLUTIONS_ EX 20B , 20C PROBABILITY

 NOTESPDF

 
 From a well-shuffled deck of 52 playing-cards, one card is drawn. Find the probability that the card drawn will :  (i) be a black card. (11) not be a red card. (111) be a red card.
(iv) be a face card. (v) be a face card of red colour.

 A card is drawn from a well-shuffled pack of 52 cards. Find the probability that the card
drawn is : (i) a spade. (ii) a red card. (iii) a face card. (iv) 5 of heart or diamond.
(v) Jack or queen. (vi) ace and king. (vii) a red and a king. (viii) a red or a King.
 
 A card is drawn from a pack of 52 cards. Find the probability that the card drawn is :
(i) a red card (ii) a black card (iii) a spade (iv) an ace (v) a black ace (vi) ace of diamonds
(vii) not a club (viii) a queen or a jack.

From a well-shuffled deck of 52 cards, one card is drawn. Find the probability that the
Card drawn Is : (i) a face card. (11) not a face card. (ii1) a queen of black colour.
(iv) a card with number 5 or 6. (v) a card with number less than 8. (vi) a card with number between 2 and 9.

All the three face cards of spades are removed from a well-shuffled pack of 52 cards. A card is then drawn at random from the remaining pack. Find the probability of getting :
(i) a black face card (i1) a queen (ili) a black card.

One card is drawn from a well-shuffled deck of 52 cards. Find the probability of getting :
(1) a queen of red colour. (ii) a black face card. (iii) the jack or the queen of hearts.
(iv) a diamond, (v) a diamond or a spade.

From a deck of 52 cards, all the face cards are removed and then the remaining cards are
shuffled. Now one card is drawn from the remaining deck. Find the probability that the
card drawn is : (i) a black card. (ii) 8 of red colour. (iii) a king of black colour.
 
Seven cards :- the eight, the nine, the ten, jack, queen, king and ace of diamonds are well
shuffled. One card is then picked up at random (i) What is the probability that the card
drawn is the eight or the king ? (ii) If the king is drawn and put aside, what is the probability that the second card picked up is :(a) an ace ? (b) a king ?
 
From a pack of 52 playing cards, all cards whose numbers are multiples of 3 are removed.
A card is now drawn at random. What is the probability that the card drawn is (i) a face card (King, Jack or Queen) (ii) an even numbered red card ?


 

HYDROCHLORIC ACID HCL Study of Compounds Notes Questions & Answers Class 10 ICSE

 HYDROCHLORIC ACID HCL Study of Compounds Notes Questions & Answers Class 10 ICSE

https://www.youtube.com/watch?v=e_kZe73QC5o
Making HCl out of H2SO4 and NaCl

Ammonium Chloride HCl + NH3 = NH4Cl Hydrochloric acid + ammonia hydroxide

https://www.youtube.com/watch?v=Wr-y0TNnaPM
Preparation of HCl hydrogen chloride gas at laboratory


https://www.youtube.com/watch?v=HckPoNUz-ro
Mrs Pursers Chem Video: the HCl fountain experiment
 
 
HCl FOUNTAIN

 

SHORT STORIES - CLASS 10 ICSE - ENGLISH 1 - SAMPLE

 SHORT STORIES - CLASS 10 ICSE - ENGLISH 1 - SAMPLE

 



Write an original story. Short story entitled - The Secret

Write an original short story entitled- The Narrow Escape

Write an original short story entitled - man is often ruined by his pride.

Write an original short story entitled - escaped.

Write an original short story, entitled - lost and found.

Write an original short story entitled- My sanity was restored.

Write an original short story entitled - regret, but too late to repent.

Write an original short story entitled- The Gift

Write an original short story entitled - I want, but don't always get.

I'll write an original short story entitled - The Hand That Rocks the Cradle rules the world.

Write an original short story based on a joint family.

Write an original short story entitled - self-help is the best help.

Write an original short story beginning with - one cold Frosty morning in the lonely island...

Write an original short story, which has the following characters - a capseller, a passerby, a stray dog, a mad man and a dwarf. 

 

SELINA CHAPTER 20 SOLUTIONS_ EX 20B , 20E , 20F , 20G _MENSURATION


SELINA CHAPTER 20 SOLUTIONS_ EX 20B , 20E , 20F , 20G _MENSURATION 


CLICKHEREFORNOTESPDF


EXERCISE 20(B)
    
   10. A solid cone of height 8 cm and base radius
     6 cm is melted and recast into identical cones,
     each of height 2 cm and diameter 1 cm. Find
     the number of cones formed.

    11. The total surface area of a right circular cone of slant height 13 cm is 90 pi cm2.
Calculate :
      i) its radius in cm.
     (ii) its volume in cm3. [Take = 3-14] .

 
    13. A vessel, in the form of an inverted cone, is
      filled with water to the brim. Its height is
      32 cm and diameter of the base is 25-2 cm.
      Six equal solid cones are dropped in it, s
      that they are fully submerged. As a result,
     one-fourth of water in the original cone
      overflows. What is the volume of each of the
      solid cones submerged ?

   '14 The volume of a conical tent is 1232 M3 and
     the area of the base floor is 154 m2. Calculate
      the
      (i) radius of the floor,
      (ii) height of the tent,
      (iii) length of the canvas required to cover this conical tent if its width is 2 m.
     

EXERCISE 20 D

10. A solid metallic cone, with radius
  6 cm and height 10 cm, is made of
  some heavy metal A. In order to
  reduce its weight, a conical hole is
made in the cone as shown and it
  is completely filled with a lighter metal. THE
  conical hole has a diameter of 6 cm and depth
   cm. Calculate the ratio of the volume of metal
  A to THE volume of the metal B in the solid.

EXERCISE 20(E)


              3. From a rectangular solid of metal 42 cm by
                           30 cm by 20 cm, a conical cavity of diameter
                      14 cm and depth 24 cm is drilled out. Find :

                     (1) the surface area of remaining solid,
                       (ii) the volume of remaining solid,
                     (iii) the weight of the material drilled out
                             weighs 7 gm per cm^3.                                    


EXERCISE 20(F)


4. A circus tent is cylindrical to a height of 8 m
  surmounted by a conical part. If total height
  of the tent is 13 m and the diameter of its base
  is 24 m; calculate
   i) total surface area of the tent,8.
  (ii) area of canvas, required to make this tent
     allowing 10% of the canvas used for folds
     and stitching.

7. A wooden toy is in the shape of
  a cone mounted on a cylinder as
  shown alongside.
  If the height of the cone is 24 cm,
  the total height of the toy is 60 cm
  and the radius of the base of the
  cone = twice the radius of the base of the cylinder
  = 10 cm: find the total surface area of the toy.
  [Take pi= 3-14]

13.                        An open cylindrical vessel of internal diameter
                               cm and height 8 cm stands on a horizontal
                         table. Inside this is placed a solid metallic right
                         circular cone. the diameter of whose base is
                                       cm and height 8 cm. Find the volume of
                         water required to fill the vessel.
                         If this cone is replaced by another cone,
                          whose height is 1 3/4 cm and the radius of whose
                     base is 2 cm, find the drop in the water level.


EXERCISE 20(F)

7. An iron pole consisting of a cylindrical portion
   110 cm high and of base diameter 12 cm is
  surmounted by a cone 9 cm high. Find
      the mass of the pole, given that 1 cm^3 of iron
has 8 gm of mass (approx). (Take pi=355/113)

10. A cylindrical water tank of diameter 2.8 m and
  height 4.2 m is being fed by a pipe of
  diameter 7 cm through which water flows at
  the rate of 4 m/s . Calculate, in minutes, the
  time it takes to fill the tank.

11. Water flows, at 9 km per hour, through a
  cylindrical pipe of cross-sectional area 25 cm^2.
  If this water is collected into a rectangular
  cistern of dimensions 7.5 m by 5 m by 4 m;
  calculate the rise in level in the cistern in
 1 hour 15 minutes.


  15. An exhibition tent is in the form of a cylinder   surmounted by a cone.
The height of the tent
   surmounted by a cone. The height of the tent
    above the ground is 85 m and height of the
    cylindrical part is 50 m. If the diameter of the  
  base is 168 m, find the quantity of canvas
    base is 168 m, find the quantity of canvas
    required to make the tent. Allow 20% extra for
    fold and for stitching. Give your answer to the
    nearest m^2.       [2001]


         20. A conical tent is to accomodate 77 persons.
             Each person must have 16m^3 of air to
             breathe. Given the radius of th ent as 7 m,
is total     find the height of the tent and also its curved
             surface area.                   

ALUMINA EXTRACTION - GOOD VIDEOS LIST

 ALUMINA EXTRACTION - GOOD VIDEOS LIST

 

How Are Aluminium Cans Recycled? | How Do They Do It?

 

https://www.youtube.com/watch?v=1u8gzoT-seg

How It's Made - Aluminium or Aluminum

 

https://www.youtube.com/watch?v=bI6OuGBx4nY  

Extraction of Aluminium

 

Aluminium Extraction - Royal Society of Chemistry

 

 

 

 

 

CHAPTER 20 CYLINDER CONES CONCISE MATHEMATICS SELINA SOLUTIONS EX 20 B

 CHAPTER 20 CYLINDER CONES CONCISE MATHEMATICS SELINA SOLUTIONS EX 20 B

 

Q11. Find the area of the canvas required to make a conical tent 14 m high and 96 m in diameter. Given that : (i) 20% of the canvas is used in folds and stitching. (ii) canvas used in folds and stitching is 20% of the curved surface area of the tent.  
 
Q10. A vessel, in the form of an inverted cone, is filled with water to the brim. Its height is 20 cm and diameter is 16.8 cm. Two equal solid cones are dropped in it so that they are fully submerged. As a result, one-third of the water in the original cone overflows. What is the volume of each of the solid cones submerged ? 
 
Q8. The ratio of the base area and the curved surface area of a conical tent is 40 : 41. If its height is 18 m, find the air capacity of the tent in terms of π.

 

 
 



 

CHAPTER 20 CYLINDER CONES CONCISE MATHEMATICS SELINA SOLUTIONS EX 20 A

 CHAPTER 20 CYLINDER, CONES | CONCISE MATHEMATICS | SELINA SOLUTIONS | EX 20 A

 

 SOLUTIONS_PDF_LINK

 

 EX20A Q3. A cylinder of circumference 8 cm and length
 21 cm rolls without sliding for 41 seconds at
 the rate of 9 complete rounds per second.
 Find
 (i) the distance traveled by the cylinder in
   4-1/2 seconds, and
 (ii) the area covered by the cylinder in 4
   seconds.
 
 EX20A Q8. A cylindrical container with diameter of base 42 cm contains sufficient water to submerge a  rectangular solid of iron with dimensions   22 cm x 14 cm x 10.5 cm. Find the rise in the level of the water when the solid is sub-merged.



 EX20A Q14. Find the minimum length in cm and correct to
  nearest whole number of the thin metal sheet
  required to make a hollow and closed cylindrical
  box of diameter 20 cm and height 35 cm.
  Given that the width of the metal sheet is I m.
  Also, find the cost of the sheet at the rate of
   56 per m.
  Find the area of metal sheet required, if 10% of it   is wasted in cutting, overlapping, etc.
 
 

 EX20A Q10. Find the total surface area of an open pipe of
    length 50 cm, external diameter 20 cm and
    internal diameter 6 cm.

 EX20A Q11. The height and the radius of the base of a
    cylinder are in the ratio 3: 1. If its volume
    is 1029 cm^3; find its total surface area.


 EX20A Q12. The radius of a solid right circular cylinder
    increases by 20% and its height decreases by
    20%. Find the percentage change in its
    volume.


 EX20A Q15. 3080 cm^3 of water is required to fill a
  cylindrical vessel completely and 2310 cm^3 of
  water is required to fill it upto 5 cm below the  top. 
Find :
  (i) radius of the vessel.
  (ii) height of the vessel.
  (iii) wetted surface area of the vessel when it is half-filled with water.

EX20A Q18. A circular tank of diameter 2 m is dug and the  earth removed is spread uniformly all around
   the tank to form an embankment 2 m in width
  and 1.6 m in height. Find the depth of the
  circular tank.

 EX20A Q21. The sum of the height and the radius of a solid   cylinder is 35 cm and its total surface area is   cylinder is 35 cm and its total surface area is   3080 cm^2; find the volume of the cylinder.

 EX20A Q22. The total surface area of a solid cylinder is
  616 cm^2. If the ratio between its curved
  surface area and total surface area is 1:2;
  find the volume of the cylinder.

 EX20A Q23. A cylindrical vessel of height 24 cm and
  diameter 40 cm is full of water. Find the exact
  number of small cylindrical bottles, each of
  height 10 cm and diameter 8 cm, which can
  be filled with this water.

 EX20A Q24. Two solid cylinders, one with diameter 60 cm
  and height 30 cm and the other with radius 30
  cm and height 60 cm, are melted and masted
  into a third solid cylinder of height 10 cm.
  Find the diameter of the cylinder formed.

 EX20A Q25. The total surface area of a hollow cylinder,
  which is open from both the sides, is 3575
  cm^2; area of its base ring is 357.5 cm^2 and its
  height is 14 cm. Find the thickness of the
  cylinder.

 EX20A Q28. A closed cylindrical tank, made of thin iron-   sheet, has diameter = 8.4 m and height 54 m.
  How much metal sheet, to the nearest m^2, is
  used in making this tank, if 1/15 of the sheet
  actually used was wasted in making the tank ?

 

EQUATION OF A LINE | SELINA CONCISE MATHEMATICS CHAPTER 14 ICSE CLASS 10 NOTES PDF REVISION

 EQUATION OF A LINE | SELINA CONCISE MATHEMATICS  CHAPTER 14  ICSE CLASS 10 NOTES PDF  REVISION

 

 
PDFLINK HAS CHAPTER SCANS AND PDF NOTES 
 
In this lecture we learn standard equation of line, how to plot a line, what are X and Y intercepts, Various shapes in which line equatin can be written, properties of points that lie on a line, slope and inclination of a line, properties of rhombus and square, slopes of parallel and prependicular lines, slopes of corrdinate axis, 4 types of equation of line, lines making equal angles with coordinate axis, collinear and concurrent points. 
 
TIME STAMP 
00:00 STD EQN OF LINE 
01:00 PLOTTING LINE 
04:37 X&Y INTERCEPTS 
06:44 VARIOUS SHAPES OF EQN 
09:55 POINT ON LINES 
11:20 SLOPE/INCLINATION 
19:30 RHOMBUS/SQUARE 
21:40 PARALLEL/PERPENDICULAR LINES 
23:40 COORDINATE AXIS SLOPES 
31:25 4 TYPES OF EQUATION OF LINES 
40:06 LINE MAKING EQUAL ANGLES WITH COORD AXIS 
43:00 COLLINEAR/CONCURRENT 
45:30 HW 
 
 
 
 
 
tags: 

ICSE CLASS X Boards Revison MCQs with Solutions | Physics MACHINES Chapter 3 (BLOCK AND TACKLE) | 2021 Semester 1

  ICSE CLASS X Boards Revison MCQs with Solutions | Physics MACHINES Chapter 3 (BLOCK AND TACKLE) | 2021 Semester 1

 


 Q1. A block and tackle system has a VR = 5. Rahul exerts a pull of 150 kgf. What is the maximum load he can raise with this pulley system if it's efficiency = 75%.

Q2. A pulley system has MA = 4. If a load of 10 kgf is pulled up a distance of 2 m in 10 s, calculate Power developed by the Effort.

Q3. The MA of a pulley is 5 and its efficiency is 80%. It is used to lift a load of 200 kgf to a height of 20m.
i) What is the Effort required?
ii) What is the VR ?
iii) What is distance moved by Effort ?