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Ask QuestionPosted by Riyaz Malik 7 years, 3 months ago
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Himanshu Kumar 7 years, 3 months ago
Posted by Himanshu Kumar 7 years, 3 months ago
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Yogita Ingle 7 years, 3 months ago
- The flexibility of plasma membrane helps uni-cellular organisms like Amoeba to engulf food by a process called Endocytosis.
- Amoeba folds it’s plasma membrane and makes false feet known as Psedopodia which help it to trap food in a food vacuole and digest it.
Posted by Vishok Kumar 7 years, 3 months ago
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Aman Barnwal 7 years, 3 months ago
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Posted by Vishok Kumar 7 years, 3 months ago
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Yogita Ingle 7 years, 3 months ago
- In wave motion, the particles of the medium vibrate about their mean positions. The particles of the medium do not move from one place to another.
- A wave motion travels at the same speed in all directions in the given medium. The speed of a wave depends upon the nature of the medium through which it travels.
- During a wave motion, energy is transferred from one point of the medium to another. There is no transfer of matter through the medium.
Posted by Vishok Kumar 7 years, 3 months ago
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Posted by Vishok Kumar 7 years, 3 months ago
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Shivam Yadav 7 years, 3 months ago
Posted by Vishok Kumar 7 years, 3 months ago
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Yogita Ingle 7 years, 3 months ago
- Sound wave also gets reflected as light waves do. Bouncing back of sound wave from the surface of solid or liquid is called reflection of sound.
- Reflection of sound follows the Laws of Reflection as light wave does. This means the angle of incident wave and reflected wave to the normal are equal.
- For reflection of sound a polished or rough and big obstacle is necessary.
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Shivam Yadav 7 years, 3 months ago
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Kumkum Sarswat 7 years, 3 months ago
Posted by Dipti Jaltare 7 years, 3 months ago
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Kumkum Sarswat 7 years, 3 months ago
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Posted by Dheeraj Sharma 7 years, 3 months ago
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Himanshu Kumar 7 years, 3 months ago
Yogita Ingle 7 years, 3 months ago
Both snake and turtle are kept in the same class because both are
- Both are cold-blooded.
- Both have scales.
- Both breathe through lungs.
- Both have three-chambered hearts.
- Both lay eggs with thick covering.
Posted by Divya Nandrayog 7 years, 3 months ago
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Yogita Ingle 7 years, 3 months ago
This means that a body is moving with a speed in a particular direction. The velocity is taken average as the speed of the body need not to be constant every time. If in 10 sec, speed is 16 m/s, then it need not to be constant in the remaining time, it can also be 22m/s in the remaining time.
Average velocity is defined as ratio of linear displacement of an object by time taken.
∴ Average Velocity = Linear Displacement / Total time
Posted by Ajmal Ibrahimi 7 years, 3 months ago
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Posted by Shailesh Bansal 7 years, 3 months ago
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Posted by Souvik Mondal 7 years, 3 months ago
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Shivam Yadav 7 years, 3 months ago
Yogita Ingle 7 years, 3 months ago
He explained the stability of an atom with the help of orbits. Atoms revolve around nucleus in orbits called stationary orbits. Till the atom revolves in it , the atom does not lose energy. Therefore , atoms are stable. He explained that Electrons while revolving in discrete orbits, do not release energy and remain quite stable and hence the complete atom remains stable.
Posted by Aaaaa Aaaaa 7 years, 3 months ago
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Yogita Ingle 7 years, 3 months ago
Following are the main characteristics of sound wave:
- Wavelength: Wave length is the length between two consecutive peaks, i.e. crest or two consecutive valleys, i.e. trough of a wave. Wave length is represented by Greek letter λ (lambda).
- Amplitude : Magnitude of maximum disturbance on either side of the normal position or mean value in a medium is called amplitude.
- Time period : Time required to produce one complete wave is called time period or time taken to complete on oscillation is called the time period of the sound wave.
- Frequency: The number of sound waves produced in unit time is called the frequency of sound waves. For example, if a source of sound produces 20 sound waves in one second then the frequency is 20 Hz.
- Speed
Navneet Kaur 7 years, 3 months ago
Posted by Yug - 7 years, 3 months ago
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Posted by Aaaaa Aaaaa 7 years, 3 months ago
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Yogita Ingle 7 years, 3 months ago
When an object vibrates, the particles in the surrounding medium vibrate. These particles send the vibrations to adjacent particles and energy continues to transmit until it reaches our ears.
A wave is a disturbance moving through a medium when the particles of a medium set the adjacent particles into vibration.
The particles do not move forward, but the disturbance does.When these vibrations reaches our ears, the ears allow us to convert pressure variations in the air with audible frequencies into electric signals that travel through the brain via the auditory nerves.
Posted by Sheetal Sood 7 years, 3 months ago
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Posted by Arya Magade 7 years, 3 months ago
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Yogita Ingle 7 years, 3 months ago
| Echo | Reverberation |
| Echo is a single reflection of a sound wave off a surface. | Reverberation is the sound or the pattern created by the superposition of such echoes. |
| An echo can be heard only when the distance between the source of sound and the reflecting body is at least 17 m. | A reverberation can occur when sound wave is reflected by a nearby wall also. |
| An echo is usually clear and can be clearly distinguished. | A reverb is not a clear replica of the original sound sample. |
| Echo can be used to determine the distance of a reflecting object such as a large building or a mountain, if the ambient temperature is known. | Reverberation cannot be utilized for distance measurement applications. |
Posted by Ayush Mahawar 7 years, 3 months ago
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Shivam Yadav 7 years, 3 months ago
Gaurav Kumar 7 years, 3 months ago
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Shital Thakur 7 years, 3 months ago
1Thank You