Indian student Shreya creates world record in SAT, TOEFL scores

Shreya Vardhan, a Class XII student of Delhi Public School, RK Puram, who has created a record by scoring a perfect 2400 in her SAT test and in her TOEFL test for admission to foreign Universities.

Easy Tips to check Water Adulteration in Milk (Hindi) (1080p HD)

A lactometer is an instrument that is used to check for the purity of milk by measuring its density.

An instrument to find out the content of the water in the milk or to test the richness of the milk is thus termed as 'lactometers'. The lactometer works on the principle of gravity of milk. The construction of this instrument is very unique as there is long vessel test tube and meter bulb attached to it so that whenever the milk is poured into the vessel the meter bulb starts floating on it. The purity of the milk gets tested without any dilution of water content in it.

These lactometers are known for precision design, accurate measurement and reliability. These lactometers are used highly at milk processing units and at dairies.

The various types of the lactometer are mercury coated lactometer which is highly acknowledged for its precision design and efficiency. Lactometer consists of test tubes and meter bulb which are two of the main parts of the lactometer.

Today we drink milk to remain fit and healthy but we do not get to know whether the milk is adulterated with the water or not.

Thus to testify the same thing use of lactometers are very effectively method.

Most of the milkman mix water in the milk to by reducing the contents of rich milk which only are essential for our body.

To avoid the mixing of water in the milk lactometers are very much used and have gained importance in due course period of time.

A lactometer measures the density of milk. It tells the user how much water is in the milk that is being sampled. This is an instrument used to determine the richness of milk. Lactometer indirectly measures the cream content of milk. The more cream, the lower the lactometer floats in the milk.

A Lactometer is a little glass instruments that tests the purity of milk based on density/buoyancy and works on the principle of the specific gravity of milk.

Principle of Lactometer :

It is based on the Archemedes' principle. When we put lactometer inside the liquid it experience buoyant force (weight of displace fluid). Hence measure relative density in the given scale of lactometer. Lower the density of liquid farther, the lactometer will sink.

So, if water adulterated in milk, it will decrease the specific density of our milk. So, lactometer will sink more according amount of water adulterated in milk. Lactometer can give real idea of amount of adulteration of water in our milk sample.

So, more adulteration of water in milk, more lactometer will sink in that adulterated milk.

Principles of Lactometer

An instrument to find out the content of the water in the milk or to test the richness of the milk is thus termed as 'lactometers'. The lactometer works on the principle of gravity of milk. The construction of this instrument is very unique as there is long vessel test tube and meter bulb attached to it so that whenever the milk is poured into the vessel the meter bulb starts floating on it. The purity of the milk gets tested without any dilution of water content in it. These lactometers are known for precision design, accurate measurement and reliability. These lactometers are used highly at milk processing units and at dairies. 

The various types of the lactometer are mercury coated lactometer which is highly acknowledged for its precision design and efficiency. The other type is the steel ball lactometer which known for its accuracy and longer working life. Lactometer consists of test tubes and meter bulb which are two of the main parts of the lactometer. The various parts of the lactometers are lacto jars which are made from stainless steel. Lacto jar are made from plastic for zeal type of lactometer. These lactometers offer accurate results and are very much appreciated for long lasting performance. 

Lactometers are very much used for industrial purpose where the milk which is manufactured is tested first and then is sent to make various products. 

Today we drink milk to remain fit and healthy but we do not get to know whether the milk is adulterated with the water or not. 

Thus to testify the same thing use of lactometers are very effectively method. Most of the milkman mix water in the milk to by reducing the contents of rich milk which only are essential for our body. 

To avoid the mixing of water in the milk lactometers are very much used and have gained importance in due course period of time.

Operation of the hydrometer is based on Archimedes' principle that a solid suspended in a fluid will be buoyed up by a force equal to the weight of the fluid displaced. Thus, the lower the density of the substance, the farther the hydrometer will sink. 

A Lactometer measures the cream content of milk. The more cream, the lower the lactometer floats in the milk.

Swami Vivekananda Rock Memorial

Closer View

Vivekananda Rock Memorial is a monument and it is a popular tourist attraction in Vavathurai, Kanyakumari, India. The memorial stands on one of two rocks located about 500 meters east off mainland of Vavathurai, India's southernmost tip. It was built in 1970 by the Vivekananda Rock Memorial Committeein in the honour of the visit of the Swami Vivekananda to Shripada Parai during the month of December 1892. The rock is approachable only by boat which provides a pleasure cruise into the sea. 

Swami Vivekananda came down to Kanyakumari on 24 December of 1892 before his departure for Chicago to participate in the World Religious Conference in 1893. He sat on meditation on this rock for two. The Memorial inaugurated in 1970 and is a blend of various architectural styles of India. The Memorial was constructed in 2081 working days with an average of 650 men working. 

It is located at the southern most tip of the Indian Peninsula where the Arabian Sea, the Indian Ocean and the Bay of Bengal meet. (Kanyakumari) This place is famous for its spectacular sunrises and sunsets. Here out in the sea, about 400m from the shore, on a rocky islet lies a magnificent monument, a memorial dedicated to Swami Vivekananda, social reformer. 

The memorial was built in 1970 by the Vivekananda Rock Memorial Committee to honor the visit of Swami Vivekananda here in December of 1892 for deep meditation. The memorial designed by Sthapati Sri S.K. Achari and consecrated by Srimad Swami Vireshwarananda, President of Ramakrishna mission. 

The memorial as a whole has two main structures Vivekananda Mandapam and Sripada Mandapam, on two rocks standing adjacent to each other separated by about 70 metres. The smaller rock known as 'Sripada Parai' has been revered as a sacred place even from very ancient times. It is now enclosed in a square shrine or Sripada Madapam. This shrine consists of the sanctum sanctorum, an inner compartment as well as outer compartment. There is an outer platform all around. 

Vivekananda Mandapam

Vivekananda Mandapam with a dimension of 534' x 426' consists of a Meditation Hall ( Dhyana Mandapam) with six adjacent rooms where visitors can meditate peacefully and an Assembly hall (Sabha Mandapam) with two rooms and a corridor. A statue of Swami Vivekananda in a standing posture has also been installed in the Assembly hall with its vision directed towards the 'Sripadam'. The entire Memorial Mandapam is similar to that of Sri Ramakrishna Temple at Belur, and the entrance is designed on the Ajanta and Ellora cave temples’ style. The sacred Hindu Symbol 'aum' or 'om' is written above the main entrance of the memorial, in Tamil. The design of the mandapa incorporates different styles of temple architecture from all over India. Wide entrance steps lead to the main entrance. The rock on which the memorial stands measures about 164. x 130 (mtrs). at the water level and has a spacious level top at an altitude of 17 mtrs. 

Sri Pada Mandapam

The rock on which the Memorial stands has, in puranic tradition been known as the Sri Pada Parai. (This in Tamil means the rock that has been blessed by the feet of the Goddesses). On this rock there is a small projection resembling the human foot, which has been revered as a symbol of Sri Padam. The special significance and sanctity attached to this rock might have promoted Swami Vivekananda, devotee of ‘Kali’ and ‘Durga’, to venture across the sea for his long meditation. 

This square hall consists of (1) Garbha Graham (Sanctum Sanctorum) (2) Inner Prakaram (3) Outer Prakaram and (4) Outer Platform all around. Both the Mandapams are so designed that the vision of Swamiji in the statue would be seen direct towards the Shripadam. 

Swami Vivekanada (1863-1902) renounced the world and traveled widely as a wandering monk after the death of his guru Sri Ramakrishna. He came to Kanyakumari in 1892, swam in the ocean up to the 'Sripada' rock, and spent the whole night there meditating. The next year in 1893, he attended the Parliament of Religions, a major event in the modern history of Hinduism, held in Chicago, and spread the Vedantha philosophy and religion in the West. He founded the Ramakrishna math and mission in 1897. 

Poompuhar Shipping Corporation operates regular ferry service to the island from the mainland. The memorial attracts thousands of visitors and offers a spectacular view of the mainland and the ocean. It opens from Wednesday to Monday from 0700 to 1100 in the morning and from 1400 to 1700 in the afternoon. Nearby there is a recently erected Tiruvalluvar statue, the author of the philosophical work 'Tirukkural', a treatise on the Indian way of life.

Life Style of Google Boy (Kautilya Pandit) by Jai Kishan Sharma (Hindi) ...

What is life style and secret of of Google Boy (Kautilya Pandit) according to his grandfather Jai Kishan Sharma?

Kautiya Pandit living in Karnal district in Haryana has a sound knowledge about geographical boundaries, outlines and other information related to the subject. Six years old Kautilya Pandit studies in Class One and at this tender age, He knows area-wise geographical distribution of land on earth.

His grandfather (retired teacher) said that a child's brain is like an elephant. It does not know how powerful it is. Kautilya Pandit said that his parents are his greatest teacher.

Jai Kishan Sharma says there is nothing mysterious about his son's penchant for trivia. "It is because he is keenly interested in learning anything he can about different countries."

The psychology department of Kurukshetra University said that Kautiya Pandit 's IQ stood around 130 points against 92-110 of a normal kid and should pay particular attention to his schooling.

For his exceptional memory and IQ (130), Kautilya Pandit was recently awarded Rs 10 lakh by the Haryana government. But the real challenge is ensuring that He gets the kind of education he deserves. "Sometime Kautilya says he wants to become an IAS officer, at other times, a scientist or astronaut," says his father.

Benefits of Vehicle Insurance by Pardeep Chhabra (Hindi) (1020p HD)

Every person who used a vehicle on the road should have at least third party personal injury insurance. It is compulsory to have vehicle insurance before using or keeping a motor vehicle on public roads. Therefore motorist cannot drive the vehicle until it is insured. Auto Insurance deals with the insurance covers for the damage caused to the automobile or its parts due to natural and man-made calamities. 

It is required by law, and you may very well be on your way to trouble if you cannot comply with it. What are the benefits of having your car insured? The answer is simple. It provides financial security, responsibility in case of accidents and payment along with total peace of mind. 

It also covers the bills of vehicle repairs due to damage caused in an accident. Car or Bike insurance acts like a friend at the time of crisis. People who drive and have car insurance know that they have a safety net that will help them tackle any financial or legal problems that might arise out of a car accident. 

Car insurance can help offset the loss of huge total in the following manner :

• It provides benefits to survivors when an accident results in death. 
• It covers the bills of vehicle repairs due to damage caused in an accident. 
• It covers lawsuits, including legal fees brought against you as the result of an accident. 
• It covers damage caused by other than an accident for example, theft, fire, etc. 
• Additional Discounts : Car insurance policies allow premium discounts for theft or for owning more than one policy with the same insurer. It also provides added advantage to extend coverage to others driving your car with your permission. 

Car premium is determined by a number of factors and the amount of premium increases with the rise in the price of the vehicle. The claims of the Auto Insurance can be accidental, theft claims or third party claims.

Milk Urea Detection Kit for On-Site Testing of Milk ~ Dr Gulshan Narang (Hindi) (720p HD)

Watch out brief demonstration of Urea Kit for On-Site Testing of adulterated milk by Dr Gulshan Narang (D.I.O, Veterinary Public Health and Epidemiology, LLR UVAS) carried out at Toxicological D. I. Lab of Veterinary Public Health and Epidemiology Department of LLR UVAS Hisar.

To get more profits, some milkman prepared synthetic milk which is very cheap and sold at the rate of natural milk. Synthetic milk consists of vegetable fat, detergent powder and urea mixed in water containing salt. This milk is similar to natural milk in colour, fat content, smell, taste and specific gravity. Around 1.0 percent urea is added to make up normal protein levels of the synthetic milk.

Consumption of synthetic milk or its product like urea can damages liver, heart and kidneys and also causes swelling of limbs and impaired vision.

There was a need for rapid tests for the detection of urea in the milk to prevent the adverse health hazards to common man.

Dr Gulshan Narang and Dr R. S. Khokhar of the Veterinary Public Health and Epidemiology, CoVS, LLR UVAS has developed a field spot test to detect urea in milk.

The principle of test is that urea reacts with the indicator giving a colored reaction which can be visualized within a minute.

Usually 0.9 to 1.0 percent urea is added for making synthetic milk. Urea is added to make the protein content and increasing the SNF content of the milk. Without addition of urea the protein levels of the milk can not be achieved.

Procedure

• Put a drop of indicator solution A on the filter paper and let it absorb.
• Put a drop of the test milk sample on the indicator drop.

If our test milk develop immediately yellow colour around the milk drop, it means our simple is mixed with Urea. That sample is contaminated with the Urea.

The Milk Urea Detection Kit is easily available for common man at Kisan Seva Kendra, HAU CCS Gate No.4 (Hisar, Haryana)

If any Person wants to initiate the commercial production of Urea Kit, He can Contact Dr N. K. Kakker of Business Planning and Development (Veterinary Products) Unit of LLR UVAS, Hisar for getting license of this kit for specific period of years.

The business person can improved the urea kit by providing other solution for detecting soda, starch and detergents in the milk sample.

Introducing the Knowledge Graph

The Knowledge Graph is a huge collection of the people, places and things in the world and how they're connected to one another. With this technology, Google can get you the best possible answers and help jump start your discovery.

Assembling of Tata-Sky Dish (Live Video) (Hindi) (720p HD)

Watch out live video of assembling of Tata-Sky Dish. In this video, you will watch assembling of Tata Sky Dish, setting their specific direction to Satellite and testing signal quality of the specific channel in Tata Sky Setbox. This video can be useful for a new user who wants to assemble his Tata Sky Dish by himself after shifting his location or in village where Tata Sky service center is still not available. (Voice : Hindi) 

Lunar Eclipses Explained

Lunar Eclipses Explained

White Cockroach (Under Skin Transition) (720p HD)

Watch out a live white cockroach that has shed its whole dark shell. This cockroach is under skin transition. A cockroach that has just shed its skin is white with black eyes. After eight hours, however, it will regain its regular shell coloring. This rear video can be useful for a teenager and biology students for knowing nature.

Mating of Butterfly (Live Video) (720p HD)

Watch out a live mating of a Butterfly pair. This video can be useful for a teenager and biology students for knowing nature. Both of these butterflies found dead after mating. 

How to score Good Marks in the Twelve Board ~ Dr Vijay Garg (Hindi) (720p HD)

Watch out useful tips for getting good marks in the twelve Board of Indian schools from Ex Professor of Botany Vijay Garg (D. N. College, Hisar). (Voice : Hindi)

Main Tips from Ex Prof. Vijay Garg :

• We should read our NCRT book carefully as mostly questions in the board exams comes from NCRT books.
• We should understand each line written in NCRT books and avoid cramping for good marks.
• Better score in the twelve board help us in getting higher ranks in Medical or Engineering Entrance exams as if two or more students get same score in entrance exams, then the student having higher score in twelve board, will get upper rank in the entrance exams than that student having lower marks in twelve board.

How to qualify Indian Medical Entrance Exams ~ Dr Vijay Garg (Hindi)

Watch out useful tips for qualifying Indian Medical Entrance Exams from Ex Professor of Botany Vijay Garg (D. N. College, Hisar) for 11th standard students. (Voice : Hindi)

Main Tips from Ex Prof. Vijay Garg :

• We should prepare entrance exams from 11th standards.
• We have to do solve multiple-choice questions of each unit and then all topics regularly for 2 years.
• We have to prefer small learning group of students from the teacher than famous institutional courses.
• Try to solve multi choice questions in proper way than cramping answer in the entrance exams.

6 Air Purifying House Plants

• Bamboo Palm : It removes formaldahyde and is also said to act as a natural humidifier.
• Snake Plant : It absorb nitrogen oxides and formaldahyde.
• Areca Palm : One of the best air purifying plants for general air cleanliness.
• Spider Plant : Great indoor plant for removing carbon monoxide and other toxins or impurities. Spider plants are one of three plants NASA deems best at removing formaldahyde from the air.
• Peace Lily : Peace lilies could be called the “clean-all.” They’re often placed in bathrooms or laundry rooms because they are known for removing mold spores. Also know to remove formaldahyde and trichloroethylene.
• Gerbera Daisy : Not only do these gorgeous flowers remove benzene from the air, they are known to improve sleep by absorbing carbon dioxide and giving off more oxygen over night.

Auto-rickshaw driver's daughter tops nation-wide CA exam

24-year-old Prema Jayakumar is making waves across India for her singular achievement of topping the Chartered Accountancy exam despite all odds. Her father, an auto-rickshaw driver, and her mother, who stopped working in a hair-clip factory a few years ago, couldn't afford her fees but supported her as she won scholarship after scholarship.

Computer Wizkid - Raghav Sood - The Youngest Programmer in India

Meet Raghav Sood (Youngest Programmer in India)

How to improve your Brain Fitness

Brain is called the CPU of human body. It works for the whole day. It works even while we are sleeping. But stress, frustration, load of work, negative thinking, smoking, drinking, unbalanced diet individually or in combined form misbalances the brain and its working.

But it is said that brain is like parachute. It only functions when it is open. So to open up your mind just try these ideas given below:

1. Meditation : It improves concentration and helps in focusing. It strengthens the mind. Mind comes under control and effectively guide the physical body to execute all its projects efficiently.

2. Mind Games and Puzzles : Many games like sudoku, crosswords and quiz help in increasing alertness, focus and concentration. They are benefit in remembering things easily and mind is then able to think faster.

3. Exercise and Dance : When you will be physically fit then you will be automatically mentally fit. According to the studies, dance is the only exercise which affects mind as it integrates several brain functions at once.

4. Sleep : If you want your mind to work properly, then sleep. Because giving your mind rest for sometime will help in recollecting energy for the next day. So sleep at least 6-8 hours per day. But remember excessive sleeping can be harmful.

5. Balanced Diet : Eat healthy to keep your brain healthy. Avoid junk, oily, packed food materials, smoking and use of liquor as mental health is always related to physical health. Eat nuts, fruits, grains, pulses and use milk products in order to get mental fitness.

6. Positive Thinking : Think positive. To achieve this share your problems, sorrows and happiness with your dear ones. And remember nothing is possible.

7. Laugh : The best cure of all diseases is to laugh. So laugh as much as you can and make others laugh too.

8. Learn New Skills and spend time for Hobby : Try to learn whatever you want to. Spend some time for your hobby whether it's dancing, singing, reading, painting, traveling or something else.

Centre of Gravity - Elementary Science

Every body is made up of a large number of particles.

In a rigid body the particles are held together in a fixed position relevant to one another.

Each particle is attracted towards the center of the earth with a force equal to its weight.

Let F1, F2, F3, F4, F5, F6 be the forces acting on the particle P, Q, R, S, T, U respectively.

The resultant of all these forces is equal to the vector sum given by F=F1+F2+F3+F4+F5+F6.

The line showing the direction of this resultant force is called the line of action.

This total force or weight of the body appears to act through the fixed point G irrespective of the position or orientation of the body, this point G is called center of gravity of the body (G) the position of the centre of gravity of a body may be falling inside or outside the material of the body. 

Center of gravity of a body is defined as a point of application of the resultant force due to the earth`s attraction on it. Center of gravity of regular bodies.

Let us consider some regular bodies. Take uniform meter scale A, B and note its mid point G. if the scale is suspended at point P or Q it dose not remain . if the scale is suspended at the mid point G its remain horizontal and stable. This geometric mid point is the center of gravity G of the scale.

For a body which has uniform density and regular shape the center of gravity G coincides with the geometric center.

Feeding and Digestion in Amoeba - Elementary Science

Amoeba is a single celled microscopic organisms mostly found in pond water. It has a cell membrane rounded nucleus and a small bubble like vacuums in its plasma. It changes its shape and pollution constantly. It projects out finger like projections called pseudopodia which is used to trap other microscopic organisms or other food particles. The food is trapped and gradually the food is digested and absorbed. These absorbed substances are used for growth, maintenance and multiplication of the organisms.

Popular Format of Computer Sounds

Mp3 (Moving Pictures Expert Group Level-2 Layer-3 Audio) : This cross-platform format is a standard for web and portable audio files. In many respects the growth of this format is tied to the popularity of iPods and audio players on cell phones. Though you can output these files in stereo, you'll want to pay close attention to bandwidth settings for your MP3s.

Wav : If you use a PC to record a voiceover or other sound, you are familiar with the WAV format. WAV files have sample rates ranging from 8 kilohertz (the quality of your phone) up to 48 kilohertz (DAT tapes) and beyond. These files are also available with bit depths ranging from 8 bits right up to 32 bits. Just keep in mind that a file with a sample rate of 48 kilohertz and a 32 bit depth will result in a massive file size that simply shouldn't be used with Flash.

QuickTime : These files have extensions of .qta or .mov and can contain audio in many formats. If you do create a QuickTime audio file, you need to make the movie self-contained in QuickTime Pro.

AIFF (Audio Interchange File Format) : AIFF is the standard for the Macintosh and offers the same sample rates and bit depths as a wav file. Many purists will argue that the AIFF format is better than the wav format. This may indeed be true, but to the average person the difference between this format and wav is almost inaudible.

ABP News explores the world of the Venus planet

Question and Answer on Motion

Very Short Answer Type Question

1.      Is the displacement is scalar quantity?

2.      State whether distance is a scalar or a vector quantity?

3.      Change the speed of 6 m/s into km/h.

4.      What name is given to the speed in a specified direction?

5.      Give two examples of bodies having non-uniform motion.

6.      Name the physical quantity obtained by diving ‘Distance travelled’ by ‘Time taken’ to travel that distance.

7.      What do the following measures in a car?

         (a)  Speedometer    (b)  Odometer

8.      Name the physical quantity which gives us an idea of how slow or fast a body is moving.

9.      Under what conditions can a body travels a certain distance and yet its resultant displacement be zero?

10.    In addition to speed, what else should we know to predict the position of a moving body?

11.    When is a body said to have uniform velocity?

12.    Under which condition is the magnetic of average velocity equal to average speed?

13.    Which of the two can be zero under certain conditions: average speed of a moving body or average velocity of a moving body?

14.    Give one example of a situation in which a body has a certain average speed but its average velocity is zero.

15.    What is the acceleration of a body moving with uniform velocity?

 16.   What is the other name of negative acceleration?

17.    Name the physical quantity whose SI unit is:

         (a) m/s     (b) m/s²

18.    What type of motion is exhibited by a freely falling body?

19.    What is the SI unit of retardation?

20.    Fill in the blanks with suitable words:

         (a)   Displacement is a …………. Quantity whereas distance is a................. Quantity.

         (b)   The physical quantity which gives both, the speed and direction of motion of a body is called it’s ………. .

     

         (c)   A motorcycle has a steady …………..  of 3 m/s². This means that every ………. It’s …………  increased by ………….

         (d)  Velocity is the rate of change of ………... It is measured in …………..

         (e)  Acceleration is the rate of change of ………. It is measured in ………..

21.  What type of motion, uniform or non-uniform, is exhibited by freely falling body? Give reason for your answer.

22.    State whether speed is scalar speed is a scalar or a vector quantity. Give reason for your choice.

23.    Bus X travels a distance 360 km in 5 hours whereas bus Y travels a distance of 476 km in 7 hours. Which bus travels faster?

24.    Arrange the following speed in increasing order:

         (i)   an athlete running with a speed of 10 m/s.

         (ii)  a bicycle moving with a speed of 200 m/s.

         (iii) a scooter moving with a speed of 30 km/h.

25.    (a)  Write the formula for acceleration. Give the meaning of each symbol which occurs in it.

         (b)  A train starting from railway station attains a speed of 21m/s in one minute. Find its acceleration.

26.    (a) What terms is used to denote the change of velocity with time?

         (b) Give one word which means the same as ‘moving with a negative acceleration’.

         (c) The displacement of a moving object in given interval of time is zero. Would the distance traveled by the object also be zero? Give reason for your answer.

27.    A snail covers a distance of 100 meters in 50 hours. Calculate the average speed of snail in km/h.

28.    A tortoise moves a distance of 100 meters in 15 minutes. What is the average speed of tortoise in km/h?

29.    If a sprinter runs a distance of 100 meters in 9.83 seconds, calculate his average speed in km/h.

30.    A motorcycle drives from place A to B with a uniform speed of 30 km/h and returns from place B to A with a uniform speed of 20 km/h. What is its acceleration?

31.    A motorcyclist starts from rest and reaches a speed of 6 m/s after traveling with uniform acceleration for  3 s. What is his acceleration?

32.    An air craft traveling at 600 km/h accelerates steadily at 10 km/h per second. Taking the speed of sound as 1100 km/h at the aircraft’s altitude, how long will it take to reach the ‘sound barrier’?

33.    If a bus traveling at a speed of 20 m/s is subjected to steady deceleration of 5 m/s², how long will it take to come to rest?

Answers

1.            No it is a vector quantity.

2.            Distance is a scalar quantity.

3.            21.6 km/h

4.            Velocity.

5.            Movement of a car in crowded road  and  racing bike.

6.            Speed

7.            (a) Measures Speed   (b) Measures Distance traveled

8.            Speed

9.            When the body comes back to its starting point.

10.        Direction of speed

11.         When a body travels same distance at same interval of time.

 

12.        When the body moves along a straight line path.

13.    Average velocity.

14.    When a body have same initial position and final position

15.    Zero (0)

16.    Retardation

17.    (a) Speed  (b) Acceleration

18.    Non Uniform Velocity

19.    m/s²

20.

(a)   Vector; Scalar

(b)  Velocity

(c)  Acceleration; Second; Speed (or Velocity); 3 m/s

(d)  Displacement; m/s

(e)  Velocity; m/s²

21.    Non uniform motion because when it comes near the earth surface due to high gravitation force it changes its speed.

22.    Speed is a scalar quantity because it does not have direction.

23.    Speed bus X = 72 km/h; Speed of bus Y= 68 km/h; so bus X travels faster.

24.    200 m/min <30 km/h <10 m/s

25.   

         (a)  a =  v-u/t 

                    

                     Where,

                     a is the acceleration of the body.

                     v is the final velocity of the body.

                     u is the initial velocity of the body.

                     t is the time taken by the body.

(b)  0.35 m/s²

26.    (a)  Acceleration 

                     (b)  Retardation

                     (c)  No, because distance is a scalar quantity having the magnitude only. It has no specified direction.

27.    0.002 km/h

28.    0.04 km/h

29.    36.62 km/h

           

30.    24 km/h                 

31.    2 m/s²

32.    50 s

33.    4 s

'एक देश, एक इम्तहान'

Patna prodigy, now IIT Prof, talks to NDTV

Patna prodigy Tathagat Sharma was the youngest to do his matriculation at the age of 9. Now, at the age of 22, he has joined India's premier engineering institute, IIT Bombay, as Assistant Professor.