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1) If X is any point in the interior of triangle ABC. Prove that XA+XB+XC> (1/2) (AB+BC+CA).
2) Using the factor theorem, factorize the polynomial
x4 + 2×3 – 13×2 – 14x + 24.
3) Factorize: 8×4 + 2×2 -1.
4)The sides of a triangle are in the ration of 13 : 14 : 15 and its perimeter is 84 cm.
Find the area of the triangle. Also find the altitude of the triangle corresponding to the longest side.
MATHS 9th CBSE QUESTIONS Read More »
James Prescott Joule (1818 – 1889)
•He was an English physicist and brewer, born in Salford, Lancashire.
•He received his early education at home
•He studied for sometime under John Dalton
•Joule studied the nature of heat, and discovered its relationship to mechanical work .
•His first major research was concerned with determining the quantity of heat produced by an electric current and, in 1840, Joule discovered a simple law connecting the current and resistance with the heat generated.
Top Known Scientist in Heat and Thermodynamics Field Read More »
Given below are the practice test papers for class 9 science term two exams. you can download and practice them. If you like them do tell us in the comment section below the post
Class 9 term 2 science practice test papers Read More »
Central Board of Secondary Education, Delhi has been conducting CBSE group Mathematics Olympiad for students studying in its affiliated schools.
WHO CAN PARTICIPATE IN CBSE GROUP MATHEMATICAL OLYMPIAD
a) Student of class XII, XI, X or IX can participate in the competition. However, there will be a common question paper for all participants. Bright students from class VIII may also appear.
b) A school can sponsor maximum five students for the competition.
CBSE Group Mathematics Olympiad Read More »
One question has always fascinated the scientists ” When the universe began?” . Current Thinking believes that Universe began as a singularity in space and Time. The singularity is called as Big Bang. It is believed at this time everything was condensed into very small space. After that the Universe has been continuously expansion mode.
A Astronomer Edwin Hubble discovered in 1929 the rate of expansion of Universe i.e the rate at which the galaxies are receding from each other. That law is called Hubble Law. As per Law, if the two galaxies are at distance R,Their present relative velocity of separation is given by
The Age of the Universe( Big Bang) Read More »
1)The word energy comes from the Greek word energeia.
2)Most types of energy are either a form of kinetic energy or potential energy.
3)Common examples include heat energy, elastic potential energy, chemical energy, sound energy, nuclear energy, geothermal energy , gravitational potential energy and electric Potential energy
4) Kinetic energy refers to the energy an object has because of its movement. A Truck in motion has kinetic energy, as does a basketball when you pass or shoot it.
In Bloom’s taxonomy there are six levels: knowledge, comprehension, application, analysis, synthesis, and evaluation. Higher order thinking skills are those skills in the top three levels: analysis, synthesis, and evaluation. These three skill levels are important in critical thinking
Whats is HOTS(High Order thinking skills) Read More »
A LED is a forward biased P-N junction diode which emits visible light when energized.
A light-emitting diode (LED) is a semiconductor light source. LEDs are used as indicator lamps in many devices and are increasingly used for other lighting. Introduced as a practical electronic component in 1962, early LEDs emitted low-intensity red light, but modern versions are available across the visible, ultraviolet, and infrared wavelengths, with very high brightness.
What are light emitting diodes? Read More »
