Urooz AliSpeed: Speed is the rate at which an object covers a distance. Speed is a scalar quantity. It has no direction . Velocity: Velocity may be defined as the rate of change of displacement. Or It can be also defined as : “ rate of change of position of an object.” Velocity is a vector … Read more
Rest: A body is said to be at rest when it does not change its position with respect to their environment and time. For example house, tower, tree etc. MOTION: A body is said to be in motion when it changes its position with respect to environment and time. For example moving car, walking man … Read more
Work And Time Concept For Class 8 Part 1 Work And Time Concept For Class 8 Part 2 Work And Time Short Cut Trick For Class 8 Part 3
Express the following as a sum of perfect square: 16a2 + b2 + 9c2 – 4ab – 3bc – 12ca =1/2.(2.16a2 + 2. b2 + 2. 9c2 – 8ab – 6bc – 24ca)= 1/2.(16a2 + 16a2+ b2 + b2 + 9c2 + 9c2 – 8ab – 6bc – 24ca)= 1/2.(16a2 – 8ab + b2 + … Read more
If a2+b2+4c2 = ab+2bc+2ca. Prove that a = b = 2c Multiplying both side by 2 we have. 2. a2 + 2. b2 + 2.4c2 = 2.ab + 2.2bc + 2.2ca 2. a2 + 2. b2 + 2.4c2 = 2ab + 4bc + 4ca 2. a2 + 2. b2 + 2.4c2 – 2ab … Read more
गर्मी का मौसम भारत में मई और जून के महीने में आता है । हम इस मौसम में बहुत असहज महसूस करते हैं। क्योंकि गर्मी का मौसम बहुत आसान मौसम नहीं है। इस गर्म से छुटकारा पाने के लिए मैने बहुत पहले से एक शांत जगह पर गर्मी की छुट्टी बिताने की योजना बनाई थी । हम … Read more
Types of Motion: Rest: A body is said to be at rest when it does not change its position with respect to their environment and time. For example house, tower, tree etc. Motion:A body is said to be in motion when it changes its position with respect to environment and time. For example moving car, … Read more
To specify the position of an object, we need a point with respect to which we identify the position of that object. This point is known as the origin or reference point. Consider a man starts walking from point O. First he goes to point P and then to point Q. as we can see … Read more
Introductin By Urooz Ali Journey By Night is written by “Norah Burke” It is one of the most popular short story of her collection: Jungle Picture Introduction: Sher Singh exhibited courage and showed fraternal love towards his brother Kunwar to take out him from the mouth of death. As the family was suffering from extreme … Read more
Satellites are small celestial bodies which revolve around planets.Watch the image where moon is shown as a planet of the Earth. As the planets revolve around the sun, the satellites move with them. As a result , satellites also revolve around the sun .Like planets ,satellites shine by reflecting light from the sun. All planets … Read more