Nikhil

Nikhil

Cheers!
Nikhil

Drums-A drum kit (also drum set, kit,[1] or trap set) is a collection of drums, cymbals and often other percussion instruments, such as cowbells, wood blocks, triangles, chimes, or tambourines, arranged for convenient playing by a single person (drummer).
The individual instruments of a drum set are hit by a variety of implements held in the hand, including sticks, brushes, and mallets. Two notable exceptions include the bass drum, played by a foot-operated pedal, created by Jonathan McEwen, and the hi-hat cymbals, which may be struck together using a foot pedal in addition to being played with sticks or brushes. Although other instruments can be played using a pedal, the feet are usually occupied by the bass drum and hi hat, and as a result the drummer plays in a seated position. Percussion notation is often used by drummers to signify which drum set components are to be played. A full size drum set without any additional percussion instruments has a bass drum, floor tom, snare drum, tom-toms, and a variety of cymbals including hi-hat cymbals, ride cymbal and a crash cymbal.
Various music genres dictate the stylistically appropriate use of the drum kit's set-up. For example, in most forms of rock music, the bass drum, hi-hat and snare drum are the primary instruments used to create a drum beat, whereas in jazz, ride and snare patterns tend to be more prevalent and the hi-hat is played by the foot. In the 2000s, an increasing number of drummers have begun to use electronic drum pads which trigger synthesized or sampled drum sounds.

Violin-The violin is a string instrument, usually with four strings tuned in perfect fifths.These strings are serially named ;G,D,A and E. It is the smallest, highest-pitched, and most famous member of the violin family of string instruments, which includes the viola and cello.The cords in a violin are played from A to the cord G.
The violin is sometimes informally called a fiddle, regardless of the type of music played on it. The word violin comes from the Middle Latin word vitula, meaning stringed instrument;[1] this word is also believed to be the source of the Germanic "fiddle".[2] The violin, while it has ancient origins, acquired most of its modern characteristics in 16th-century Italy, with some further modifications occurring in the 18th century. Violinists and collectors particularly prize the instruments made by the Gasparo da Salò, Giovanni Paolo Maggini, Stradivari, Guarneri and Amati families from the 16th to the 18th century in Brescia and Cremona and by Jacob Stainer in Austria. Great numbers of instruments have come from the hands of "lesser" makers, as well as still greater numbers of mass-produced commercial "trade violins" coming from cottage industries in places such as Saxony, Bohemia, and Mirecourt. Many of these trade instruments were formerly sold by Sears, Roebuck and Co. and other mass merchandisers.
A person who makes or repairs violins is called a luthier, or simply a violin maker. The parts of a violin are usually made from different types of wood (although electric violins may not be made of wood at all, since their sound may not be dependent on specific acoustic characteristics of the instrument's construction), and it is usually strung with gut, nylon or other synthetic, or steel strings.
Someone who plays the violin is called a violinist or a fiddler. The violinist produces sound by drawing a bow across one or more strings (which may be stopped by the fingers of the other hand to produce a full range of pitches), by plucking the strings (with either hand), or by a variety of other techniques. The violin is played by musicians in a wide variety of musical genres, including Baroque music, classical, jazz, folk music, pop-punk and rock and roll. The violin has come to be played in many non-western music cultures all over the world.

Guitar-The guitar is a plucked string instrument, usually played with fingers or a pick. The guitar consists of a body with a rigid neck to which the strings, generally six in number but sometimes more, are attached. Guitars are traditionally constructed of various woods and strung with animal gut or, more recently, with either nylon or steel strings. Some modern guitars are made of polycarbonate materials. Guitars are made and repaired by luthiers. There are two primary families of guitars: acoustic and electric.
Acoustic guitars (and similar instruments) with hollow bodies, have been in use for over a thousand years. There are three main types of modern acoustic guitar: the classical guitar (nylon-string guitar), the steel-string acoustic guitar, and the archtop guitar. The tone of an acoustic guitar is produced by the vibration of the strings, which is amplified by the body of the guitar, which acts as a resonating chamber. The classical guitar is often played as a solo instrument using a comprehensive fingerpicking technique.
Electric guitars, introduced in the 1930s, rely on an amplifier that can electronically manipulate tone. Early amplified guitars employed a hollow body, but a solid body was found more suitable. Electric guitars have had a continuing profound influence on popular culture. Guitars are recognized as a primary instrument in genres such as blues, bluegrass, country, flamenco, jazz, jota, mariachi, reggae, rock, soul, and many forms of pop.

etc.

Q1. Apu's mother was worried about his:

(a) Marriage
(b) Job
(c) Scholarship
(d) Nothing

Q2. Who was Akhil Babu?

(a) Apu's friend
(b) Debu's friend
(c) Principal of Ripon College
(d) Debu's incle

Q3. Apu was able to find Akhil Babu's house by :

(a) Someone told him
(b) By the address given by his friend and with the help of the street map of Calcutta
(c) He knew itby himself
(d) None of these

Q4. Apu got a job for Rs.:

(a) 100
(b) 20
(c) 15
(d) 50

Q5. Where is Naples situated?

(a) India
(b) China
(c) Italy
(d) Europe

Q6. Who is know as "AAPA" ?

(a) Cargo Boat
(b) Apu
(c) Syed Nazima Amir Ahmed
(b) Sania Mirza

Q7. Full for of EXNORA is:

(a) EXpert NOvel RAdiation
(b) EXcellent NOvel RAdical
(c) EXcellent NOward RAtio
(d) None of these

Q8. The rag pickers get a salary of Rs. :

(a) 900
(b) 1000
(c) 50
(d) 650

Q9. Austin is trying to :

(a) Pollute the surroundings
(b) Reduce garbage and increase reuse and recycling within a generation
(c) Make a bomb
(d) None of these

Q10. Who is Sania Mirza's inspiration?

(a) Steffi Graf
(b) Glamour
(c) Her Parents
(d) She herself

Q11. What is Sania's future goals?

(a) Get a nice ob
(b) Be in top 20
(c) Getting married
(d) Play another sport

Q12. Michael Jordan is known as :

(a) Basketball Star
(b) Golf Star
(c) Big Money
(d) None of these

Q13. Michael Jordan is associated with ___ company

(a) Hero Honda
(b) Addidas
(c) Yonex
(d) Nike

Q14. Who was Gajala?

(a) Rouge Elephant
(b) Poacher
(c) Villager
(d) None

Q15. Who shot the elephant?

(a) Gajala
(b) Villagers
(c) Poachers
(d) He himself died

Q16. The unicorn shuddered because :

(a) He felt happy
(b) He was surprised to see the boy
(c) He went mad
(d) He was angry to see the boy

Q17. What did the boy keep with him?

(a) A book
(b) The strand of hair from the unicorn's mane
(c) A leaf
(d) Unicorn's Horn

Q18.Meaning of Garland is :

(a) A chain of flowers
(b) A type of garden
(c) A land of flowers
(d) None

Q19. Which memory brings back the light? (POEM: The light of Other Days)

(a) Happy
(b) Mischievous
(c) Sad
(d) Angry

Q20. The cheerful hearts have now: (POEM: The light of Other Days)

(a) Joined
(b) broken
(c) Gone
(d) None of these

1. Sate Newton's law of motion. Derive it.

2. Define
a) Gravitaty and an expression for acceleration due to gravity
b) Pressure
c) Freefall

3. If the earth attracts an apple does the apple also attract the earth? If yes, why does the earth not move towards the apple?

4. Why does a mug full of water feel lighter inside water?

5. A perpendicular force of 50N acting on a surface generate a pressur of 250pa. lculat tarea of cross section of surfac on which pressure is acting.

6. Why and when does acceleration due t graity ating on a body change.

7. A body has 40kg mass. Calculate it's wt. when it is taken to a planet whose mass is 4 times the earth and radious half then that of the earth.

8. How does the wt. of a body gets affected when the is taken to poles from equator?

9. Wy does the moon not actujally fall on the surface of the earth?

10. State the difference between mass and weight.

11. A bar of gold has mass of 100g ad weight is9.8 N at some place when it is taken to some place at equator mass remains 100g but wt. is <0.98. Explain.

12. If the force of gravity vnishes why would we be flying in space?

13. A bag of sugar weighs W at a certain pace at equator. If this bag is taken to Antertica will th wt. remain the same or more or less. Why?

14. Give reasons:
a) Sleepers are provided under railwayn tracks
b) It is difficult to dross a rsert on a horce back.
c) The bull of a rifle is very broad but tip of bullet is pointed.
d) Dams are made wide at base
e) Cuttin instruments are often sharpened
f) Board pins are broad at the end and ointed on the other.
g) Skier's sink in fresh snow.
h) Sledges used by eskimos have no wheels.

15. Calaulate the pressure when force of 1000N acts on 2^m2 area.

16. Calculate the force if it produces a pressure of 50000pa. over 0.125^m2.

Regards
Anandita
ix-c

Regards
Anandita
ix-c

Nikhil

1. Ruhi- word bank of 50 words
2. Me, Aditi- short answer type questions (15)
3. Kartik- true false questions (15)
4. Ambika- fill in the blanks (15)
5. Rajat- match the following (15)
6. Shreyansi- MCQs (15)
7. Anant- long answer questions (10)

1. Mother says I was a dancer (thank you for the music)
Before I could walk
She says I began to sing
Long before I could talk
And I’ve often wondered,
How did I tall start?
a. Name the poet.
b. Explain the above lines in about 20-30 words.

2. Explain in brief what all Apu saw when he came out of Sealdah railway station? (Apu)

3. Why do the maintenance employees at the station call Syed Nazima Amir Ahmed ‘Aapa’? (cities in action)

4. In rows and little golden squares (where are you now?)
The lights come out. First here, then there
Behind the window panes as though
A million billion bees had built
Their golden hives and honeycombs
a. Name the poet.
b. What does the poet wants to say by these lines?

5. What does Sania have to say when asked about her rankings? (an interview with sania mirza)

6. Why do the companies want to be associated with the winners? (corporate world of sports)

7. How is the crowd behaving when the match is on? (a football game)

8. Which is the best competition in tennis? Has Sania ever won it? (an interview with sania mirza)

9. Which city formed the organization EXNORA and what was it all about? (cities in action)

10. Thus, in a silly night, (the light of other days)
Ere slumber’s chain has bound me,
Sad memory brings the light
Of other days around me.
a. Name the poet.
b. What is the speaker’s mood in the poem?
c. What does it mean? Do these lines make the poem sad?

11. How does the poet describe his love life he had in those days? (the light of other days)

12. Briefly explain the twist that came in the story when the hunter fired? (the rogue)

13. Why had the rogue elephant killed several people in the village? Did it really wanted to do so? (the rogue)

14. Where did the poet keep the strand of hair from the unicorn’s mane? Did it helped him to dream the unicorn again? ( dreaming the unicorn)

15. Does the poem have a magical feel? Explain in about 20-30 words. (dreaming the unicorn)

Nikhil

Nikhil

One concept based question:
(Q) When a person walks on a rough surface the frictional force exerted by the surface on the person is opposite to the direction of his motion.
State whether the above statement is true or false with a reason .

answer of the above question….. by ANNAMIKA….

Don't try too many things in different places. It will cause confusion.

Nikhil

Participation in project SAMVEDNA

(a)Developing group wiki websites.
(b)Doing online projects:-
-Maths arobics
-Scratch
-Energy conservation
- Safe neighbourhood
-kogics

(c)Forums
-Class notes
-Sharing numericals
-Clearing up problems with sir and classmates
-Getting guidance from online mentors from IIT & IIM

Classroom teaching

(a)Concepts & notes
(b)Derivation
(c)Classroom interaction
(d)Project discussion
(e)Children coming and solving numericals
(f)Self and peer assessmint
(g)Oral assessment

please let me know that my answer is correct or not..

By THE THIRD LAW OF MOTION :

v²=u²+2as

0=400+2*a*0.5

-400=0.1a

a=-400/0.1

a=-4000m/s²

:-The negative sighn represent retardation……………..

m2=180g=180\1000=0.18kg

m2xv=m1 u1
v=m1xu1/m1
v=0.12x6.0/0.18
v=4m\s

thank you

Q2. Who was responsible for the condition the elephant was in? Why did they do it?
A2. Poachers were responsble for the hurting and trapping the elephant. They wanted to take away its
tusks and sell the ivory in the market.

Q3. Why did Gajala decide to help the elephant by himself without asking the villagers?
A3. Gajala decided to help the elephant by himelf without asking the villagers because he feared that they
would kill him.

Q4. Who shot the elephant?
A4. The poachers shot the elephant.

Q5. How did Gajala die?
A5. The poachers shot the elepphant. As a result its head jerked and his tusks got Gajala's head and sent
him flying in the air. This impact killed Gajala.

Q2. Who was responsible for the condition the elephant was in? Why did they do it?
A2. Poachers were responsble for the hurting and trapping the elephant. They wanted to take away its
tusks and sell the ivory in the market.

Q3. Why did Gajala decide to help the elephant by himself without asking the villagers?
A3. Gajala decided to help the elephant by himelf without asking the villagers because he feared that they
would kill him.

Q4. Who shot the elephant?
A4. The poachers shot the elephant.

Q5. How did Gajala die?
A5. The poachers shot the elepphant. As a result its head jerked and his tusks got Gajala's head and sent
him flying in the air. This impact killed Gajala.

2. A car keeps moving aftr it's engine is switched of.

3. The movement of a gas molecule is an example of movement by inertia. Each move by inertia rectilinearly and uniformly from one collision to another.

4. If the car engine is switched off without breaking, the car does not stop at once.

5. When a horse sudddenly gallops forward, the man sitting on his back may be thrown back unless he presses his thighs hard against the horse.

6. When a car in motion is suddenly stopped, the passengers inside are thrown forward because thir bodies continue in the state of motion in a strightline.

7. If a cyclist, when in sped, applies break suddenly, he is thrown forward because of the tendency of his body to continue in the uniform motion.

8. People usually tumble down when they alite from a train in motion.

9. When a corridor train stops suddenly, sliding doors of some apartments may open or shut due to the inertia of rest or motion.

10. When a tree is shaken the branches move in one direction but the fruits tend to remain in their previous position due to inetia of rest. This causes a break in the contact with the branches and the fruits fall down.

11. When a carpet is beaen with a stick, the carpet comes into motion but the dust particles present in it tend to remainat rest due to inertia of rest. As a result, the dust particles areremoved from it by beating it.

UNIVERSAL lAW OF GRAVITATION

A B
M m
I I
I I
I I
<---—R---——>
F momentum Mm —> F=GMm/R² —>F momentum Mm/R²

F momentum 1/R²

—>G=FR²/Mm = Nm²/kg² = N.m²kg^-2

F=Force of attraction between A and B
R=Distance between Centre of A and B

M and m= Masses of body A and B
According to the Newton F Momentum Mm
F is directly propotional to product of masses F momentum Mm

F is inversely proptional to the square of distance between them
F=GMm/R²
Unit of G=Unit Gv. Constt.
—>G=FR²/Mm=Nm²/kg² = N.m²kg^-2

G=6.7*10^-11Nm²kg^-2
From the above we can say that
a)If the masses between them increases the force will also be increases.
b)If the distance between them decrease than force increases.

p=m*v
=kg m/s

example:-
GMm/R² > GMm/(2R)²
GMm/R² > GMm/(4R²)

Derivation of value G (Accerelation due to gravity)
Let M be the mass of Earth
R radius of the Earth
According to N second law of motion we have F=ma-(I)
or F=m*g
Where
F=force of attraction between A and B and g is the acceleration due to gravity
Also according to universal law of gravitation we have
F=GMm/(R+n)²—(II)
Since h«R
F=GMm/R²(II)
from (I) and (II)
Since LHS=F
mg=GMm/R²
g=GM/R²

Example:-
g=6.7*10 Nm²/kg²*6*10 kg/(6.4*10⁶m)²
g=(6.7*6)*(10^-!!*10²⁴)Nm²kg/kg²*6.4*6.4*10⁶*10⁶m²
g=40.2*10¹³kg m / kg*40.96*10² s ²
=40.2/40.96*10m/s²
=9.8m/s²

MAss and Weight
Mass:-Mass is the measure of quantity of matter contained in a body. It is a scaler quantity thet remains constant irrespective of the location of the body.Thus, mass of the body on the Earth and the moon remains the same.
Weight:-Weight is the force with which a body (mass) a pulled towards the centre of the Earth or any other body like the sun , the moon , planets etc. It is a vector quantity. It depends on the force of gravity generated by a body while attracting another body.

Weight of an objecton the moon
Let:-
m=mass of object
We=Weight of the object on Earth
Wm= Weight of object on the moon
Re=radius of the earth
Rm=Radius of the moon
Me=Mass of earth
Mm=mass of moon

>We=Gm Me/Re²(I)
>Wm=Gm Mm/Rm²(II)
Divide (I) by (II), we get
We/Wm=Gm Me/Re² * Rm²/GMm^m=(Me)/(Mm)(Rm)²/(Re)
We/Wm=(5.98*10kg²⁴)/(7.36*10²²kg)*(1.74*10⁶m)/(6.4*10⁶m)
=(0.8125*10²)(0.273)²
We/Wm=(0.8125*10²)(0.075)
=0.060*10²=6—>Wm=1/6We

Q. 1. What do you mean by a force?

Q. 2. Give an example of a balanced force?

Q. 3. Can force change the shape of an object? Give an example to prove your point?

Q. 4. Do action and reaction force react in the same direction?

Q. 5. Why a moving ship does takes longer time as compared to a car when equal breaks are applied?

Q. 6. Why are passengers through in forward direction when a running bus stops suddenly?

Q. 7. Why do passengers tend to fall sideways when the bus takes a sharp u turn?

Q. 8. Why should a passenger hold on to prevent himself from swaying in a turning bus?

Q. 9. Why do passengers tend to fall back when it starts suddenly?

Q. 10. Why do passengers jumping out of a rapidly moving bus fall forward with his face downwards, if he does not run forward?

Q. 11. Why does a passenger jumping out of a rapidly moving bus fall forward with his face downwards?

Q. 12. Why can dust be removed by shaking it, or beating it by a carpet?

Q. 13. Why does a bullet when fired against a glass window pane make a hole in it, and the glass pane will smash it?

Q. 14. Why does an athlete take a longer jump if he comes running from a distance than when he jumps suddenly from the take-off line?

Q. 15. What happens when you shake a wet piece of cloth? Explain, why?

Q. 16. Why is it advised to tie a rope on the luggage while you travel by the bus?

Q. 17. How does a boat move forward into the water when the boatman presses one end of the pole against the ground?

Q. 18. Why is it difficult for a fireman to hose, which ejects large amount of water at a high velocity?

Hope you find it interesting…….

• We will now derive this law by newtons third law of motion.

mA= mass of ball A
mB= mass of ball B
_UA= initial velocity of ball
_UB= initial velocity of ball B
_VA= final velocity of ball A
_VB= final velocity of ball B
t= time of collision
FAB= force of A on B
FBA= force of B on A

FAB = rate of change of momentum
= ma(_VA-_UA)
FBA = mB(_VB-_UB)

According to third law of motion
FAB = FBA
mA(_VA-_Ua) = mBNB + mB_UB
mA_VA + mB_VB = mA_UA + mB_UB

Important points regarding third law of motion:-

• The action and reaction are forces that act in opposite direction.
• Boyh the forces occures simultaneously.
• Action and reaction are forces which are always equal to each other.

Question ;- an engine of mass 8000kg exerts a force of 40000n on tthe 5wagons mass of each is 2000kg. track offers a frictional force of 5000n. calculate the net accelerating force acceleration of the train force of wagon 1on wagon 2???

Regards
Anandita Dalal
ix c