He went there and found the old woman in tears. He asked her what had happened. At first, she did not say anything but continued crying. Slowly, she said that her husband who was sleeping had accidentally rolled off the bed and was in pain. She could neither lift him up nor help him get up on his own. Since the old lady was blind, she could not reach out for the telephone to call the doctor or anyone else for help. Shobhit asked her where the old man was and she pointed to a room. When he went there, he found the old man on the floor. Slowly but firmly, he helped the old man get up and lay him on the bed.

He then took his mobile phone and called his friend telling him to bring his car over to the place he directed. The friend arrived shortly and they took the old man to the hospital. Shobhit felt that it was not safe to leave the old lady alone. So, they took her as well. They had to wait for some time to meet the doctor. The old man was graining in pain and his wife as sobbing uncontrollably. Finally, it was their turn to meet the doctor. After examining the patient, the doctor said that it was a case of multiple fracture and he had to undergo an operation. When Shobhit asked the old lady about her children so that he could inform them, she said that she had only one child and that he was abroad. He never visited them and they always managed by themselves. Shobhit decided that he would take the place of the son and requested the doctor to go ahead with the required treatment. From that day, Shobhit considered them as the grandparents he never had. The old man made a speedy recovery and they returned home soon. Shobhit made it a point to check on them daily and find out if there was anything he could do for them.

AB=square root of((9-9)^2+(6-0)^2)=6
BC=square root of((9-(-9))^2+(6-6)^2)
=square root of (18^2+0)=18
CD=square root of((-9-(-9))^2+(6-0)^2)
=square root of(0+6^2)=6
AD=square root of((9-(-9))^2+(0-0)^2)
=square root of(18^2+0)=18
Since, AB=CD AND BC=AD
THEREFORE, A,B,C,D ARE THE VERTICES OF A RECTANGLE.

1. The angles of quadrilateral are in the ratio 3 : 5 : 9 : 13. Find all the angles of the quadrilateral.

Solution:

Let the common ratio between the angles be = x.

We know that the sum of the interior angles of the quadrilateral = 360°

Now,

3x+5x+9x+13x = 360°

⇒ 30x = 360°

⇒ x = 12°

, Angles of the quadrilateral are:

3x = 3×12° = 36°

5x = 5×12° = 60°

9x = 9×12° = 108°

13x = 13×12° = 156°

Butenal on oxidation gives butanoic acid.

Butanoic acid can be obtained by oxidation of butan-1-ol.

The most common reagent used for oxidation of alcohols is chromium (Vl) reagents including chromic acid (H₂CrO_4­), potassium dichromate (K₂Cr₂O₇) and chromic anhydride (CrO₃).

When raw data are processed and converted into meaningful form then it is referred to as Information. A data processing unit (DPU) is a programmable electronic component that processes streams of data. The data is transmitted to and from the component as multiplexed packets of information. To be effectively used in making decisions, data must go through a transformation process that involves six basic steps: 1) data collection, 2) data organization, 3) data processing, 4) data integration, 5) data reporting and finally, 6) data utilization.

Computer memory is a generic term for all of the different types of data storage technology that a computer may use, including RAM, ROM, and flash memory.

Some types of computer memory are designed to be very fast, meaning that the central processing unit (CPU) can access data stored there very quickly. Other types are designed to be very low cost, so that large amounts of data can be stored there economically.

Another way that computer memory can vary is that some types are non-volatile, which means they can store data on a long term basis even when there is no power. And some types are volatile, which are often faster, but which lose all the data stored on them as soon as the power is switched off.

A computer system is built using a combination of these types of computer memory, and the exact configuration can be optimized to produce the maximum data processing speed or the minimum cost, or some compromise between the two.

The Discriminant Formula in the quadratic equation ax² + bx + c = 0 is

• If the discriminant value is positive, the quadratic equation has two real and distinct solutions.
• If the discriminant value is zero, the quadratic equation has only one solution or two real and equal solutions.
• If the discriminant value is negative, the quadratic equation has no real solutions.

The Discriminant Formula in the quadratic equation ax² + bx + c = 0 is

• If the discriminant value is positive, the quadratic equation has two real and distinct solutions.
• If the discriminant value is zero, the quadratic equation has only one solution or two real and equal solutions.
• If the discriminant value is negative, the quadratic equation has no real solutions.

Question 1.
Describe the condition of roll – top box. From where the author found the roll-top box?
Answer:
The roll-top box was made up of oak. It was in very bad condition. It brings scorch mark all down one side & one leg is clumsily mended. He found roll – top box from a junk shop in Bridport

Question 2.
Why did the author buy roll top box even though it was in bad condition?
Answer:
The Author bought roll top box of bad condition because it cost little money and he could easily restore it by working on it.

Question 3.
What did the author find in the secret-drawer?
Answer:
He found a tin-box cello – taped to the top of that was a piece of lined notepaper in the secret drawer.

Question 4.
What was written on the tin box?
Answer:
‘Jim’s last letter, received January 25, 1915.’ was written on the tin box.

Question 5.
What was there inside the tin box?
Answer:
Inside the box there was an envelope. The address read: ‘Mrs. Jim Macpherson, 12 Copper Beeches, Bridport Dorset’ and then he took out the letter and unfolded it. It was written in pencil and dated at the top – ‘December 26, 1914’.

Question 6.
Describe briefly about Christmas morning on the behalf of letter sent by Jim to Connie.
Answer:
Christmas morning was crisp and quiet all about, as beautiful a charming day. It was totally cold and frosty as a Christmas morning should be.

Question 7.
Who was Hans Wolf?
Answer:
Hans Wolf was the officer of Fritz. He was from Dusseldorf. He played a cello in the orchestra.

Question 8.
Who was Jim Macpherson?
Answer:
Jim Macpherson was a school teacher. He was from Dorset, in the west of England.

Question 9.
What did Hans & Jim talk about when they were sharing rum & sausage?
Answer:
They talked about their favourite book, ‘Far from the madding crowd’, with Bathsheba, Gabriel Oak, Sergeant Troy and Dorset.

Question 10.
How usually the war end? And how should it be end and why?
Answer:
Normally, wars end by shedding blood and loses of properties and people. But there a football match resolves the war. As “No one dies in a football match. No children are orphaned. No wives become widows”.

Yes, I would like to become invisible, but only if I could get back to normal. It would be a unique and adventurous experience. I would be able to free people caught in the vicious circle of crime, help the police catch criminals and help the deprived sections of the society. I would not like to convert myself into an invisible creature forever as it would deprive me of all the benefits of being a human and my family and friends.If I take a firm stand as a citizen, I am sure I will be able to do all the things even when visible. It is just about how determined a person is.

Smallest prime number = 2

Smallest composite number = 4 

Slaves were women and men who were often captured in war. They were treated as the property of their owners, who could make them do whatever work they wanted.

Hydel power:

• It is generated by fast flowing water.
• It uses renewable resources.
• Initially its cost was high but later it became cheaper.
• It does not cause any pollution.
  Example: Bhakra Nangal project.

Thermal power:

• It is generated by using coal, petroleum and natural gas.
• It uses all non-renewable resources.
• Its cost is very high and its production is expensive.
• It does cause pollution.
  Example: Badarpur thermal plant of Delhi.

Let us convert 5/7 and 9/11 into decimal form, to get 

5/7 = 0.714285... and 9/1 = 0.818181.... .

Three irrational numbers that lie between 0.714285.... and 0.818181.... are:

0.73073007300073….

0.74074007400074….

0.76076007600076….

Means of spread of Infectious disease

1)Air-borne diseases:Microbial agents can move from an affected person to someone else through air.

It occurs through the little droplets thrown out by an infected person who sneezes or coughs.

Someone standing close by can breathe in these droplets, and microbes get chance to start a new infection.
For Example :Common cold, pneumonia, tuberculosis

2)Water-borne diseases:They can be spread through water.

If the excreta from someone suffering from an infectious gut disease such as cholers or amoebiasis gets mixed with drinking water used by people living nearby.

The cholera infected bacteria will enter new hosts through the water they drink and cause disease.

3)Sexually Transmitted diseases(Syphilis,AIDS):These diseases are transmitted by sexual contact from one partner to other.However these diseases are not transmitted by causal physical contact.
AIDS virus can also spread through blood to blood contact with infected people or infected mother to her baby during pregnancy or breast feeding.

4)Through vectors:Vectors are carrier of a disease or infection.
Many animals which live with us may carry disease.These animals carry infecting agents from a sick person to another host.

Maps represent the real world on a much smaller scale. They help you travel from one location to another. They help you organize information. A street map will show you roads, their names, and various locations along those roads.

Importance of Maps

• To understand roads and subways at new places.
• To calculate distance between two places.
• To know whether there are two or more paths to the same place and which is the shortest.
• We can get information about mountains, rivers, valleys or any other thing, which may come on the way, and we can prepare for that.

A n s w e r:
It is not always true.

for example  (i)  5 + 6 = 11, 11 is not a perfect square.
                 (ii) 21 + 22 = 43, 43 is not a perfect square.