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Ask QuestionPosted by Govardhan Gani 5 years, 4 months ago
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Posted by Lalithya Sivakumar 5 years, 4 months ago
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Gaurav Seth 5 years, 4 months ago
Given: A luminous object is placed 20cm from the surface of a convex mirror is set so that the virtual image formed in the two mirror coincide. If the plane mirror is at a distance 12cm from the object
To find the focal length of the convex mirror.
Solution:
As plane mirror is place at a distance of 12 cm from the object, the image formed by plane mirror will be at a distance of 12 cm from the plane mirror as shown in above figure.
AS the virtual image formed by two image coincides, the distance between object and image in both cases is 12+12=24cm as shown in figure.
Given object distance in convex mirror is 20 cm from the convex mirror, so the image will be 4cm (24−20=4) away from the convex mirror, as shown in the figure.
Hence considering convex mirror,
Object distance, u=−20cm
Image distance, v=+4cm
Applying the mirror formula,
1/v + 1/u = 1/f
f = 5 cm
Posted by Dega Nishitha 5 years, 4 months ago
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Sangam Thakur 5 years, 4 months ago
Posted by Sage Chaudhary 5 years, 4 months ago
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Umasankar N 5 years, 4 months ago
Rachit Pal 5 years, 4 months ago
Posted by Sage Chaudhary 5 years, 4 months ago
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Posted by Priyanka Kumari 5 years, 4 months ago
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Posted by P Najeer Khan 5 years, 4 months ago
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Yogita Ingle 5 years, 4 months ago
- Concave mirrors are commonly used in torches, search-lights and vehicles headlights to get powerful parallel beams of light.
- They are often used as shaving mirrors to see a larger image of the face. The dentists use concave mirrors to see large images of the teeth of patients.
- Large concave mirrors are used to concentrate sunlight to produce heat in solar furnaces.
Posted by Beauty Singha 5 years, 4 months ago
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Yogita Ingle 5 years, 4 months ago
Carbon has a valency of four, so it is capable of bonding with four other atoms of carbon or atoms of some other monovalent element.
This is known as tetravalency of carbon.
Sangeeta Kumari 5 years, 4 months ago
Posted by Atul Kumar 5 years, 4 months ago
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Yogita Ingle 5 years, 4 months ago
The importance of ozone is defined by the fact that it protects the earth from harmful ultraviolet rays from the sun. The ozone layer is found in the upper regions of the stratosphere where it protects the earth from the harmful ultraviolet rays of the sun. These radiations can cause skin cancer in humans. The ultraviolet rays split the oxygen molecule into free oxygen atoms, these free oxygen atoms combine with the oxygen molecule to form ozone. This salient layer lies at a distance of 12-15 miles beyond the earth surface.
Posted by Geeta Jadav 5 years, 4 months ago
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Posted by Geeta Jadav 5 years, 4 months ago
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Posted by Geeta Jadav 5 years, 4 months ago
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Posted by Aman Kumar 5 years, 4 months ago
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Yogita Ingle 5 years, 4 months ago
Baking Soda
- Has only one ingredient – Sodium Bicarbonate
- Does not contain Monocalcium Phosphate
- Reacts immediately with acids
- Short leavening process
- Baking products formed when baking soda is used are not as fluffy when compared to baking powder products, due to shorter reaction duration.
Baking Powder
- Consists of many ingredients including Bicarbonates (typically baking soda), and acid salts.
- Contain Monocalcium Phosphate, which reacts with NaHCO3 when wetted and heated.
- It does not immediately react when exposed to acids.
- The leavening process extended with the help of a second acid.
- Gives fluffier products from baking
Gaurav Joshi 5 years, 4 months ago
Posted by Sudhanshu Singh 5 years, 4 months ago
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Posted by C Akhilesh 5 years, 4 months ago
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Posted by Geeta Jadav 5 years, 4 months ago
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Riya ? 5 years, 4 months ago
Gaurav Seth 5 years, 4 months ago
please- potassium
send- sodium
cats- calcium
monkey- magnesium
and- aluminum
zebras- zinc
in- iron
their- tin
lovely- lead
happy- hydrogen
cages- copper
made of - mercury
silver & - silver
gold - gold
Gaurav Seth 5 years, 4 months ago
" Kedar Nath Ca Mali Aloo Zara Fike Sne Pkata Hai Cyuki Har taraf Alag Auloo Pdta hai "
1) Kedar - K - Potassium
2) Nath - Na - Sodium
3) Ca - Ca - Calcium
4) Mali - Mg - Magnesium
5) Aloo - Al - Aluminium
6) Zara - Zn - Zinc
7) Fike - Fe - Iron
8) Se - Sn - Tin
9) Pkata - Pb - Lead
10) Hai - H - Hydrogen
11) Cyuki - Cu - Copper
12) Har - Hg - Mercury
13) Alag - Ag - Silver
14) Auloo - Au - Gold
15) Pdta - Pt - Platinum
Posted by Geeta Jadav 5 years, 4 months ago
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Posted by Geeta Jadav 5 years, 4 months ago
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Gaurav Seth 5 years, 4 months ago
The oxides of a metal are basic in nature or in other words they react with acids to form salt and water. In the case of non-metals, they are acidic in nature to form acids when they dissolve in water. Sulphur-dioxide dissolved in water can be tested with litmus.
SO2+2H2O→H2SO4+2H.
Sulphuric acid is acid that turns blue litmus to red.
Posted by Pramod Somnath 5 years, 4 months ago
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Posted by Vikash Kumar 5 years, 4 months ago
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Gaurav Seth 5 years, 4 months ago
Sexual reproduction takes place in humans.
- The human male reproductive system is a series of organs located outside of the body and around the pelvic region of a male that contribute towards the reproductive process. The male contributes to reproduction by producing spermatozoa. The process of spermatogenesis takes place in testes.
- The female reproductive system consists of ******, cervix, uterus, oviducts and ovaries.
- At certain intervals, the ovaries release an ovum, which passes through the Fallopian tube into the uterus.
- The ova are larger than sperm and are generally all created by birth. Approximately every month, a process of oogenesis matures one ovum to be sent down the Fallopian tube attached to its ovary in anticipation of fertilization. If not fertilized, this egg is flushed out of the system through menstruation.
- If the ova meets with sperm, the sperm penetrate and merge with the egg, fertilizing it. The fertilization usually occurs in the oviducts, but can happen in the uterus itself. . When developed enough to survive outside the womb, the cervix dilates and contractions of the uterus propel the fetus through the birth canal, which is the ******
- Human reproduction takes place as internal fertilization by sexual intercourse. During copulation, the sperms are introduced into the female's ******. The sperm then travels through the ****** and cervix into the uterus or fallopian tubes for fertilization of the ovum. Upon successful fertilization, the zygote then implants itself in the wall of the uterus, where it begins the processes of embryogenesis and morphogenesis. Thus gestation of the foetus occurs within the female's uterus, called pregnancy. There is a period of nine months of pregnancy before childbirth.
Posted by Bhargav Navin 5 years, 4 months ago
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Bhargav Navin 5 years, 3 months ago
Gaurav Seth 5 years, 4 months ago
magnetic field line is the path along which a free north-pole tends to move. The direction of a magnetic field at a point is determined by placing a small compass needle. The N - pole of compass indicates the direction of magnetic field at that point. Magnetic field lines emerge from the North pole and merge at the South pole.
Vel Aswin 5 years, 4 months ago
Posted by Kavy Patel 5 years, 4 months ago
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Vel Aswin 5 years, 4 months ago
Posted by Khush Kaur 5 years, 4 months ago
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Sahil Khushalani 5 years, 4 months ago
Posted by Khush Kaur 5 years, 4 months ago
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Gaurav Seth 5 years, 4 months ago
Connect an ammeter in the circuit and three voltmeter across each resistance as shown in figure. Note the reading of ammeter let us say it is
(i). Note the reading of voltmeters let us say they are V1, V2 and V3 respectively across R1, R2 and R3. Now by ohm’s law
We will find that i1 = i2 = i3 = i.
Hence same current flows through every part of the circuit.
Posted by Kunal Sharma 5 years, 4 months ago
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Chandresh Tiwari 5 years, 4 months ago
Posted by Manyata Pathak 5 years, 4 months ago
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Posted by Govardhan Gani 5 years, 4 months ago
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Vel Aswin 5 years, 4 months ago
Kunal Sharma 5 years, 4 months ago
Anupama ?? 5 years, 4 months ago
Posted by Geeta Jadav 5 years, 4 months ago
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Kunal Sharma 5 years, 4 months ago
Anupama ?? 5 years, 4 months ago
Posted by Shubham Sinha 5 years, 4 months ago
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Posted by Unique #Seraj Ali ??? 5 years, 4 months ago
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