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NEWTON'S FIRST LAW AND INERTIA:
All the material bodies possess the property of opposing any alter in the state of rest or uniform motion when some external force is applies upon them. It means that the state of rest or uniform motion does not alter by itself unless some external force acts upon it; which is same to the statement of first law of motion. That is why the first law of motion is also known as 'law of inertia'.
Volume of Solid Ring A solid sphere is bored out such that the radial axis of the removed cylinder passes through the centre. The ring of remaining material stands 6 centimetre
Medicines: 1. Iodine 131 is used for the study of thyroid glands. 2. Radiation in low dosage can also be used for sterilizing bandages. 3. Radio-Cobalt-60 has been widely
The waves which do not needs medium for their propagation are known as non- mechanical or electromagnetic waves. Examples : Light, heat (Infrared), radio waves, gamma- rays, X-r
Molecules of a medium after absorbing incoming light radiations, sends them in all direction. This process is called as Scattering.
Can several fibers gives the same amount of light? No, some fibers do not give similar amount of light. If a no. of fibers or light guides are coupled similar illuminator, this
Two parallel rectangular plates measuring 20 cm by 40 cm carry an electric charge of 0.2µC. Measure the electric flux density. If the plates are spaced 5mm apart and the vo
A baseball bat strikes a ball with a force of 30 newtons. If the ball was in contact with the bat for 1/10 of a second, What impulse did the ball receive? Ans - 3 Newt
A step-up transformer works on 220V and gives 2A to an external resistor. The turn ratio between the secondary and primary coils is 2 : 25. Assuming 100% efficiency, Determine the
Defect of short sightedness In this defect the image of the object is formed in front of retina or the lens become so converging.
explain the pitch of sound and also explain is the ghosts come in the category of matter? is the sound is the form of wave? explain sound,intensity,types,loudness of sound, quality
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