Exercises on Chapter 11 of Science Class 9
1. Look at the activities listed below. Reason out whether or not work is done in the light of your understanding of the term ‘work’. (a) Suma is swimming in a pond. (b) A donkey is carrying a load on its back. (c) A wind-mill is lifting water from a well. (d) A green plant
Rate of doing Work CLASS 9TH
Consider two children, say A and B. Let us say they weigh the same. Both start climbing up a rope separately. Both reach a height of 8 m. Let us say A takes 15 s while B takes 20 s to accomplish the task. What is the work done by each? The work done
Law of Conservation of Energy – for CLASS 9TH (Physics)
According to this law, energy can only be converted from one form to another; it can neither be created nor destroyed. The total energy before and after the transformation remains the same. The law of conservation of energy is valid in all situations and for all kinds of transformations. The sum of kinetic energy
Law of Conservation of Energy – for CLASS 9TH (Physics) Read More »
लता मंगेशकर जी की पसन्द। Taste of Lataji
किशोर कुमार के पूछने पर कि आपको मेरा कौन सा गाना सबसे पसन्द आया, लताजी पूछीं कि बता दूँ या सुना दूँ। किशोर दा ने सुनाने को कहा तब लता जी ने उनके लिए इसे जा कर रिकॉर्ड करवाया एवं बर्थडे के return gift के रूप में उनको भेजा। मुझे लगा कि शायद इस गीत
Potential Energy for Class 9
Life is impossible without energy. The demand for energy is ever increasing. Where do we get energy from? The Sun is the biggest natural source of energy to us. Many of our energy sources are derived from the Sun. We can also get energy from the nuclei of atoms, the interior of the earth, and
कर्दमेश्वर महादेव KARDAMESHWAR MAHADEV
काशीजी के पचकोसी यात्रा के प्रथम दिवस के पड़ाव के देव, कर्दमेश्वर महादेव के लिये भवानी के साक्षी रहते हुए शिव ने कहा था, जो नर नारी आपके द्वारा (कर्दम ऋषि के द्वारा) स्थापित एवं पूजित कर्दमेश्वर का दर्शन पूजन व अर्चन करेंगे, उन दर्शनार्थियों-यात्रियों के मनोरथ पूर्ण होंगे और उनके परिवार में मेधावी, विद्वान
काशीके पचकोसी यात्रा के विविध रंग
काशीजी की पंचक्रोशी यात्रा को प्रायः लोग नंगे पाँव से ले करके गाड़ी तक से करते हैं। परंतु आज मैं आपको उसके किये जाने के एक नए ढंग से परिचित करूँगा। धन्य हो उन सपूतों का जो ऐसे कार्य के सहभागी बन रहे हैं।। ।।सीताराम।।
Kinetic Energy for Class 9 th
Life is impossible without energy. The demand for energy is ever increasing. Where do we get energy from? The Sun is the biggest natural source of energy to us. Many of our energy sources are derived from the Sun. We can also get energy from the nuclei of atoms, the interior of the earth, and
Work for 9th Class
Living beings have to perform several basic activities to survive. We call such activities ‘life processes’. The energy for these processes comes from food. We need energy for other activities like playing, singing, reading, writing, thinking, jumping, cycling and running. Activities that are strenuous require more energy. Animals too, get engaged in activities.