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Physical universe:
The universe is vast. The Earth we live on appears to be just a speck of dust circling a small star in a remote corner of an obscure galaxy. If we are a speck in the immense space, we also occupy dnly an instant in the expanse of time. The universe is also very old. We now know that it is about fifteen or twenty billion years OM, while we, the human beings have been around for only two million years or so. This vast and ancient universe is populated with a variety of objects. Let us now understand what objects constitute the universe and how they are distributed. In other words, what the physical structure of the universe is. In doing so, we will not go into its chemical composition or aoy other details. However, before we embark on this venture, we will give you an idea of the cosmic distances, so that you're able to appreciate what follows.
Define the Nature of Sound This section is a recapitulation of what you have learnt in school. You would recall that sound waves consist of the longitudinal waves of alternate
Mechanical Analysis of soil texture Mechanical analysis is actually the particle size analysis which is done to determine the amount of various separates or the groups of part
What is an atom?
describe the factor which decide the broad area of scientific activity?
Observe the surface of the moon :- Use the small telescope or a pair of field glasses. Examine the surface of the moon and see if you can see any of its craters and mountains.
Hard and soft water in cleaning Prepare two samples of dirty cloth. Wash one in soft water with soap unless it is clean. Wash the other cloth in hard water for the similar leng
Describe the factors which decide the broad area of Scientific activity.
A hair hygrometer This device will enable you to read the relative humidity directly without the use of tables. Procure a few human hairs about 30 cm long. Free them from gr
Geocentric Universe of the Ancients: The earliest ideas of the Egyptians and Sumerians about the universe may seem strangeto us. The Earth appeared flat 2nd solid tg them.
Fire Alarms : Most modern fire alarm systems are electric and can be activated from several points throughout a building. These points usually consist of glass-covered switches wh
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