Thursday, September 29, 2016

Class 8, 10: Science - Uses of Some Common Metals and Non-Metals

Uses of Some Common Metals and Non-Metals


Class 8, 10: Science - Uses of Some Common Metals and Non-Metals

USES OF SOME COMMON METALS


MetalMain Uses
Iron

Bridges,
Train tracks,
Construction Bars, Steel,
Engine Parts, Iron sheets etc.

CopperElectrical Wires,
Utensils,
Coins etc.

Aluminium    Electric Wires,
Utensils, Airplanes,
Metallic Paints,
Foil for packaging etc.

Silver

Jewellery, Electroplating, photography,
Utensils, Coins,
silvering of mirrors etc.

GoldJewellery and Decorations, Coins

Lead

Batteries, Alloys, Paints, Alloys like solder,
Protective screen for X-Rays etc.

Mercury

Thermometers, Barometers, Dental amalgams etc.


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Sunday, September 25, 2016

Class 6 - Our Pasts - WHAT BOOKS AND BURIALS TELL US (Q and A)

Class 6 
Our Pasts 

WHAT BOOKS AND BURIALS TELL US 

Q & A based on NCERT Chapter

Class 6 - Our Pasts - WHAT BOOKS AND BURIALS TELL US (Q and A)
Megalith with port holes called cists

Q1: How many Vedas are there? Name them.

Answer: There are four Vedas. These are:
1. The Rigveda
2. The Samveda
3. The Yajurveda
4. The Atharveda


Q2: Name the oldest Veda.

Answer: The Rigveda. It was composed 3500 years ago.


Q3: Name the plant mentioned in the Rigveda which was used to prepare a special drink.

Answer: Soma


Q4: In which language The Rigveda was written?

Answer: Vedic Sanskrit


Q5: Give examples of Indo-European languages.

Answer: Sanskrit, Assamese, Gujarati, Hindi, Kashmiri, English, German

Wednesday, September 21, 2016

CBSE Class 12 Business Studies - Capital Market vs Money Market

Capital Market vs Money Market


CBSE Class 12 Business Studies - Capital Market vs Money Market

Important Differences


BasisCapital MarketMoney Market
1. ParticipantsIndividual Investors, Financial Institutions, Banks, Foreign Investors, Corporate Groups etc.reserve Bank Of India, Commercial Banks, Financial Institutions, Mutual Fund Houses, Corporate Groups. Individual Investors are not allowed to participate.
2. Instruments TradedBonds, Debentures, Equity Shares, Preference Shares etc.Commercial Papers, Treasury Bills, Certificates of Deposits etc.
3. Investment OutlayValue of units of security is low, t does not require huge financial outlay.

Monday, September 19, 2016

CBSE Class 10 - Real Numbers Problems on Euclid's Division Algorithm(2016)

Real Numbers Problems on
Euclid's Division Algorithm(2016)

CBSE Class 10 - Real Numbers   Problems on Euclid's Division Algorithm(2016)

Q1(CBSE 2012): Using Euclid’s division algorithm, find the HCF of 240 and 228.

Answer: By Euclid’s division algorithm,
⇒ 240 = 228 × 1 + 12
⇒ 228 = 12 × 19 + 0
∴ HCF (240, 228) = 12


Q2(CBSE 2014): The length, breadth and height of a room are 8m 25 cm, 6m 75 cm and 4 m 50 cm respectively. Find the length of the longest rod that can measure the three dimensions of the room exactly.

Answer:
∵ 1m = 100 cm
∴ 8 m 25 cm = 825 cm
6 m 75 cm = 675 cm
4 m 50 cm = 450 cm
The length of the longest rod = HCF(825, 675, 450)
⇒ 825 = 675 × 1 + 150
675 = 150 × 4 + 75
150 = 75 × 2 + 0
∴ HCF(825, 675) = 75
450 = 75 × 6 + 0
∴ HCF(450, 75) = 75
∴ HCF (825, 675, 450) = 75×
Thus, the length of the longest rod is 75 cm.

Q3(NCERT Exemplar): Write whether every positive integer can be of the form 4q + 2, where q is an integer.Justify your answer.

Answer: No, every positive integer cannot be expressed as only of the form 4q + 2.