Monday, 30 June 2014

Time left in The End Of Fossil Fuels class10

The End Of Fossil Fuels

Fossil fuels, as the name suggests, are very old. North Sea oil deposits are around 150 million years old, whilst much of Britain’s coal began to form over 300 million years ago. Although humans probably used fossil fuels in ancient times, as far back as the Iron Age1, it was the Industrial Revolution that led to their wide-scale extraction.
And in the very short period of time since then – just over 200 years – we’ve consumed an incredible amount of them, leaving fossil fuels all but gone and the climate seriously impacted.

Current Status of Coal production in world Project Class 10

Coal production
List of coal production

Current Status of Natural gas production in world Project Class 10

Natural Gas----

Current Status of Natural resources(oil) in world Project Class 10

1. Oil
According to the International Energy Agency (IEA), in 2011 the top ten oil-producing

Sunday, 29 June 2014

Sunday, 15 June 2014

Exercise 1.4 Real Number NCERT Solution Class 10 maths

Q.1 Without actually performing the long division, state whether the following rational numbers will have a terminating decimal expansion or a non - terminating repeating decimal expansion :

Exercise 1.3 Real Number NCERT Solution Class 10 maths

Q.1 prove that √5 is irrational.

Exercise 1.2 Real Number NCERT Solution Class 10 maths

Q.1 Express each number as product of its prime factor :
(i) 140   (ii) 156   (iii) 3825   (iv) 5005   (v) 7429

Saturday, 14 June 2014

Exercise 1.1 Real Number NCERT Solution Class 10 maths

Q.1 Use Euclid's division algorithm to find the HCF of :
(i) 135 and 225   (ii) 196 and 38220   (iii) 867 and 255