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Ask QuestionPosted by Ramesh Ydv 5 years, 3 months ago
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Posted by Ayush Jha 5 years, 3 months ago
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Yogita Ingle 5 years, 3 months ago
- The biological process of removal of harmful nitrogenous metabolic waste from the body is called excretion.
- Unicellular organisms excrete by diffusion and multicellular organisms use specialized organ to perform same function.
Posted by Kamal Aggarwal 5 years, 3 months ago
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Yogita Ingle 5 years, 3 months ago
Oxalic acid is a dicarboxylic acid with the chemical formula C2H2O4. Oxalic acid occurs in the cell sap of Oxalis and Rumex species of plants as the potassium and calcium salt.
Posted by Shreya Kumari 5 years, 3 months ago
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Yogita Ingle 5 years, 3 months ago
The male gonad is the the testis or testicle. It is located behind the ***** in a pouch of skin called *******. The testes produce and store sperm, and they are also the body's main source of male hormones (testosterone). These hormones control the development of the reproductive organs and other male characteristics, such as body and facial hair, low voice, and wide shoulders.
The female gonad is the ovary. It is one of a pair of reproductive glands in women. They are located in the pelvis, one on each side of the uterus. The ovaries have two functions: they produce eggs (ova) and female hormones. Each month, during the menstrual cycle, an egg is released from one ovary. The ovaries are the main source of female hormones (estrogen and progesterone). These hormones control the development of female body characteristics, such as the breasts, body shape, and body hair. They also regulate the menstrual cycle and pregnancy.
Posted by Rahul Kumar 5 years, 3 months ago
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Sakshi Singh 5 years, 3 months ago
Posted by Confusion ??? Master ??? 5 years, 3 months ago
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Akhya Sahay 5 years, 3 months ago
Khush Kaur 5 years, 3 months ago
Palvi Goel 5 years, 3 months ago
Posted by Abhay Verma 5 years, 3 months ago
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Posted by Yash Kaushik 5 years, 3 months ago
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Gaurav Seth 5 years, 3 months ago
Height of the needle (h1) = 4.5 cm
Object distance( u) = – 12 cm
Focal length of the convex mirror (f)= 15 cm
Image distance = v
The value of v can be obtained using the mirror formula:
1/f = 1/v - 1/u
1/u = 1/v - 1/f
= 1/-25 - 1/5
= -5 -1/25
= -6/25
u = -25/6 = -4.167 cm
1/v = 1/f - 1/u
1/f = 1/u + 1/v
= 1/15 + 1/12
= 4 +5/60
= 9/60
f = 60/9 = 6.7 cm
Hence, the image of the needle is 6.7 cm away from the mirror. Also, it is on the other side of the mirror.
The image size is
m = h2/h1 = -v/u
h2 = -v x h1 /u
= -6.7 x 4.5/ -12 = 2.5 cm
Hence Hence, magnification of the image, m = h2/h1 = 2.5/4.5 = 0.56
The height of the image is 2.5 cm. The positive sign indicates that the image is erect, virtual, and diminished.
If the needle is moved farther from the mirror, the image will also move away from the mirror, and the size of the image will reduce
Gaurav Seth 5 years, 3 months ago
A 4.5 cm needle is placed 12 cm away from a convex mirror of focal length 15 cm. Give the location of the image and the magnification. Describe what happens as the needle is moved farther from the mirror.
Given,
Now using the mirror formula,
we have,
∴ Image is formed at 6.7 cm at the back of the mirror ( because v is positive)
Now,
Magnification,
Hence, the image formed is erect, and of course virtual.
As, needle is moved farther away from the mirror then as a result, image moves away from the mirror (upto F) and keeps on decreasing in size.
Posted by Tiksha Gupta 5 years, 3 months ago
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Posted by Tiksha Gupta 5 years, 3 months ago
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Tripura * 5 years, 3 months ago
Shivam Yadav 5 years, 3 months ago
Posted by Tiksha Gupta 5 years, 3 months ago
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Gaurav Seth 5 years, 3 months ago
Reproduction means to reproduce. It is a biological process by which an organism reproduces an offspring who is biologically similar to the organism. Reproduction enables and ensures the continuity of species, generation after generation. It is the main feature of life on earth.
Posted by Ritesh Prajapati 5 years, 3 months ago
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Gaurav Seth 5 years, 3 months ago
Aqueous solutions states use of water. The reaction using given compounds is -
NaCl + CO2 + H2O + NH3 --> NH4Cl + NaHCO3
In the reaction, NaCl is sodium chloride or common salt, CO2 is Carbon dioxide, H2O is water, NH3 is ammonia, NH4Cl is ammonium chloride and NaHCO3 is sodium hydrogen carbonate.
The reaction is part of reactions used for industrial production of sodium carbonate or soda ash. The overall reaction for production is -
2 NaCl + CaCO3 → Na2CO3 + CaCl2
where CaCO3is calcium carbonate, Na2CO3 sodium carbonate and CaCl2 is calcium chloride.
Posted by Rishika Swami 5 years, 3 months ago
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Gaurav Seth 5 years, 3 months ago
Snell's Law: The ratio of the sine of the angle of incidence to the sine of the angle of refraction is a constant for a given pair of media and for a given wavelength of light.
Conditions for no refraction:
1. If the light is incident perpendicularly to the surface of the two media.
2. If the refractive index of the both the mediums is same.
Posted by Confusion ??? Master ??? 5 years, 3 months ago
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Khush Kaur 5 years, 3 months ago
Posted by Confusion ??? Master ??? 5 years, 3 months ago
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Akhya Sahay 5 years, 3 months ago
Posted by Nitin Vaishya Nitin Vaishya 5 years, 3 months ago
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Posted by Prathamesh Shevale 5 years, 3 months ago
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Posted by Palak Prajapati 5 years, 3 months ago
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Meghna Thapar 5 years, 1 month ago
Lateral displacement is directly proportional to the width or thickness of the glass slab. It is also directly proportional to the angle of incidence. The factors on which lateral displacement of a ray of light passing through a rectangular glass depend are: 1) The thickness of the glass slab: The thicker the glass slab, more is the lateral displacement. 2) Angle of incidence: The lateral shift increases with increase in angle of incidence.
Lateral displacement depends upon the thickness of the glass slab, the angle of incidence and angle of refraction and since these two angles are related by refractive index, we can equally say that the lateral displacement depends upon the refraction index.
Posted by Prathamesh Shevale 5 years, 3 months ago
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Meghna Thapar 5 years, 3 months ago
Benzoyl peroxide is used in the treatment of acne vulgaris. Benzoyl peroxide is found in cereals and cereal products. Added to bread and cheese as bleaching agent Benzoyl peroxide is an organic compound in the organic peroxide family. It consists of two benzoyl groups joined by a peroxide group. Benzoyl peroxide is an oxidizer which is used as a medication, as a bleach and water disinfectant, and as an important industrial chemical. In specialized contexts, the name may be abbreviated as BPO. As a medication, Benzoyl peroxide is mostly used to treat acne, either alone or in combination with other treatments.
Posted by Palak Prajapati 5 years, 3 months ago
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Meghna Thapar 5 years, 3 months ago
In a rectangular glass slab, the emergent Ray is parallel to the direction of the incident ray. The extent of bending of the ray of light at the opposite parallel faces of the rectangular slab is equal and opposite. This is why the rat emerges parallel to the incident ray. This is because in the case of the glass slab the surfaces (on which light is incident and emerging) are opposite and parallel to each other. Whereas, in the case of a glass prism the surfaces are inclined to each other at some angle.
Posted by Palak Prajapati 5 years, 3 months ago
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Meghna Thapar 5 years, 3 months ago
If light enters any substance with a higher refractive index (such as from air into glass) it slows down. The light bends towards the normal line. If light travels enters into a substance with a lower refractive index (such as from water into air) it speeds up. The light bends away from the normal line. When light rays travel from air into glass or from air into water, it bends towards normal. This is because the speed of light rays decrease while travelling from air into glass or water. Case 2: When light rays travel from optically denser medium to rarer medium then they bend away from the normal.
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Shubham Jha 5 years, 3 months ago
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