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Ask QuestionPosted by Ashutosh Mishra 4 years ago
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Posted by Ashutosh Mishra 4 years ago
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Yogita Ingle 4 years ago
Sound needs a material medium like solid ,liquid or gas to travel and be heard because the molecules of solid, liquid and gases carry sound waves from one place to another. Sound cannot travel through vacuum or empty space because vacuum has no molecules which can vibrate and carry sound waves.
Posted by Ashutosh Mishra 4 years ago
- 1 answers
Yogita Ingle 4 years ago
The sound is produced by vibrating objects. They travel from one place to another in the form of waves. Hence, the name sound waves.
Posted by Ashutosh Mishra 4 years ago
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Posted by Ashutosh Mishra 4 years ago
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Posted by Ashutosh Mishra 4 years ago
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Ronak Dahiya 4 years ago
Posted by Ashutosh Mishra 4 years ago
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Prachi Saxena 4 years ago
Posted by Lijo Jerry 4 years ago
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Posted by Kush Gajjar 4 years ago
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Gaurav Seth 4 years ago
|
Symbol of element |
Name of element |
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K |
Potassium |
Most Reactive |
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Na |
Sodium |
↓Reactivity decreases |
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Ca |
Calcium |
||
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Mg |
Magnesium |
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Al |
Aluminium |
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Zn |
Zinc |
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Fe |
Iron |
||
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Pb |
Lead |
||
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H |
Hydrogen |
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Cu |
Copper |
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Hg |
Mercury |
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Ag |
Silver |
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Au |
Gold |
||
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Pt |
Platinum |
Least reactive |
Posted by Tanaaz Belal 4 years ago
- 1 answers
Gaurav Seth 4 years ago
In string instruments like veena, sitar or violin, sound is produced because of vibration. Vibration of the strings in string instruments produce sound
Whereas
Wind instruments like flute produce sound by the help of air blown into them, in other words sound is produced by vibration occuring in air.
Posted by Diti Patel 4 years ago
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Gaurav Seth 4 years ago
Slow combustion is a form of combustion which consumes time and takes place slowly. Cellular respiration is an example of slow combustion. In respiration, glucose is oxidised and carbon dioxide and energy are released in the process. This is a very similar reaction to combustion. When a hydrocarbon burns, such a natural gas or methane (CH4), it combines with oxygen, producing CO2 and water and large amount of energy.
However, the energy released in combustion and respiration are very different.
Posted by ❖Mʀ᭄ ℟ᴜđʀ₳★ᶠᶠ 4 years ago
- 1 answers
Gaurav Seth 4 years ago
It consist of Ovaries,oviduct,fallopian tubes,uterus,******.
1)Ovaries:They are oval shaped organ, inside abdominal cavity.There are 2 ovaries, makes egg or ova and *** hormones, composed of thousand of follicles.At puberty these follicles mature to form ripe egg.
2)Oviducts:Above the ovaries,not connected directly to ovaries but have funnel shaped opening which almost cover ovaries.
The egg released by an ovary goes into oviduct through funnel shaped opening.Fertilisation take place in oviduct.
3)Uterus:The two oviducts connect to a bag like organ called uterus.the growth and development of fertilised egg take place in uterus.
4)Cervix:Uterus is connected through a narrow opening called cervix to another tube called ******.
Posted by Pranav Jatav 4 years ago
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Posted by Sanchita Das 4 years ago
- 5 answers
Maher Patel 4 years ago
Jubraj Jani 4 years ago
Rahul Gupta 4 years ago
Gursharanjeet Singh 4 years ago
Tadpoles are frog firstly from their adult
Like the adult man is known as baby in small age
Posted by Christina Shaju 4 years ago
- 2 answers
Sanchita Das 4 years ago
Posted by Bagu Ram 4 years ago
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Yogita Ingle 4 years ago
At the age of adolescence a human body undergoes several changes that marks the onset of puberty. At this age they become capable of reproduction.
During adolescence a human body undergoes following changes:
Increase in height
- There is a sudden increase in height. Some of the children may grow at the age of puberty and then slow down but some of them may grow gradually. Genes inherited from parents, fooding habits influence the growth in children to a great extent.
Change in shape of body
- During puberty the body of children undergoes several changes. In boys the shoulders grow broad, muscles grow more prominently. In girls the region below the waist becomes wide.
- Both boys and girls reach their maximum height at the age of 18 years.
Change in voice
- Voice box grows as soon as the children reach the age of adolescence. Boys grow a larger voice box that appears as a bulging part of the throat. This is called Adam’s apple. As they reach adolescent their voice becomes hoarse.
Posted by Bagu Ram 4 years ago
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Yogita Ingle 4 years ago
The period of life, when the body undergoes changes, leading to reproductive maturity, is called adolescence. The period of adolescence is normally 11 years to 19 years
Posted by Rihan Pathan 4 years ago
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Yogita Ingle 4 years ago
Mercury is used in extracting gold from ore in artisanal mining. The mercury amalgam is usually vaporised to leave the pure gold behind. Highly toxic process.
Posted by Rubi Kumari 4 years ago
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Jubraj Jani 4 years ago
Yogita Ingle 4 years ago
Pure substances are substances that are made up of only one kind of particles and has a fixed or constant structure. Pure substances are further classified as elements and compounds. An element is a substance that consists of only one type or kind of atom.
Posted by Dhairya Bhajbhuje 4 years ago
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Yogita Ingle 4 years ago
A black hole is a place in space where gravity pulls so much that even light can not get out. The gravity is so strong because matter has been squeezed into a tiny space. This can happen when a star is dying.
Posted by Sana Shaikh 4 years ago
- 3 answers
Anshul Thakur 4 years ago
Yogita Ingle 4 years ago
Two advantages of sowing by transplantation are:-
i) It allows us to plant the seedlings at the right spacing and select only healthy seedlings for the plants.
ii) It promotes better development of shoot system of plants and penetration of roots in the soil.
Posted by Saanvi Jamwal 4 years ago
- 5 answers
Anshul Thakur 4 years ago
Yogita Ingle 4 years ago
The sound which is unpleasant for our ears is called noise while music is the sound which is pleasant for our ears. Music becomes noise sometimes when it crosses the bearable range of sound for our ears.
Posted by Sp Sp 4 years ago
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Posted by Ruchika Chandrakar 4 years ago
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Saanvi Jamwal 4 years ago
Posted by Kavita Sokhal 4 years ago
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Abc Def 4 years ago
Posted by Bhavya Thakur 4 years ago
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Posted by Ʋß么Thanos ㅤㅤ 4 years ago
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Harshika ? 4 years ago
Yogita Ingle 4 years ago
Alexander Fleming, a Scottish scientist discovered the first antibiotic & named it ‘Penicillin’.
Penicillin discovery was ‘a chance’ discovery. Fleming was experimenting with Staphylococcus bacteria. A petridish (cell culture dish) had been left open by mistake, was found to be contaminated by blue-green mold. This visible mold growth inhibited bacterial growth around itself.
Posted by Aditi Gupta 4 years ago
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Ronit Singh 4 years ago
Posted by Ashwin Jadhav 4 years ago
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Ansh Thukral 4 years ago
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