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Yogita Ingle 6 years, 1 month ago
The biologically important compounds that contain both oxygen and nitrogen are nitrates (NO2-) and nitrates (NO3-). These are important forms of nitrogen to be utilized by the plants to synthesize biomolecules like proteins.
Posted by Kripakanwar Parmar 6 years, 1 month ago
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Yogita Ingle 6 years, 1 month ago
The heart receives deoxygenated blood from different parts of the body, and it pumps this blood to the lungs. The oxygenated blood from the lungs returns to the heart, which is pumped again into different parts of the body by the heart. Thus, the blood passes twice through the heart making one complete round through the body. This is called double circulation.
Pulmonary and systemic circulation
The pulmonary circulation pertains to lungs. The blood flows from the right ventricle to the lungs. Pulmonary veins collect oxygenated blood from the lungs and carry it back to the heart (left auricle).
The systemic circulation pertains to the major circulation of the body. The aorta receives the blood from the left ventricle and sends it to the various parts of the body. Veins collect the deoxygenated blood from the body parts and pour it back into the right auricle.
Posted by Aadya Singh 6 years, 1 month ago
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Yogita Ingle 6 years, 1 month ago
1-Plants; Bio mass is a type of material that is derived from plants. This plant derived material can be used to create fuels, such as ethanol and bio diesel, which are essentially carbon neutral.
Wind; Wind energy can be used to produce electricity. As wind passes through the blades of a windmill, the blades spin. The shaft that is attached to the blades turns and powers a pump or turns a generator to produce electricity.
Oceans; Oceans contain both thermal energy from the sun’s heat and mechanical energy from the tides and waves.
Geothermal energy uses heat from within the earth to produce electricity and provide heating and cooling. Geothermal energy is an underused resource that emits little to no greenhouse gas emissions.
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Yogita Ingle 6 years, 1 month ago
Given,Height of object h1= 2cm
Object distance u= -20 cm
Focal length of concave mirror f= -10 cm
To find:
Distance of screen = Image distance v=?
Height of image h2=?
We know that mirror formula is:
1/v = 1/u = 1/f
Substituting the given values in the formula:
1/v + 1/(-20) = 1/(-10)
1/v = 1/(-10) + 1/20
1/v= 10/-200
v= -200/10= -20cm
Screen should be placed at distance 20 cm from mirror in order to obtain sharp image
In other words, screen should be placed at distance 20+20 = 40 cm from the object in order to obtain sharp image.
Image will be formed in front of the mirror, i.e. real.
Magnification = -image distance/object distance
Magnification= -(-20)/(-20)
Magnification=-1
Also,Height of image = - (Height of object)
This means that image is of same size as the object but it is inverted.
Posted by Kathiravan J 6 years, 1 month ago
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Yogita Ingle 6 years, 1 month ago
Uses of Plaster of Paris
- Plaster of Paris is used by doctors for supporting fractured bones in the right position.
- It is used for making toys and decorative materials.
- It is also used for increasing smoothness of surfaces.
Posted by Madhu Sree 6 years, 1 month ago
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Yogita Ingle 6 years, 1 month ago
- Detergents are preferred over soaps as detergents have wider range of uses.
- Detergents can be used in hard water as they reacts less to minerals of hard water and
- does not form unwanted residues.
- While in case of soaps, they cannot be used in hard water.
- In hard water soap will form scum, which is difficult to remove.
Hence detergents are preferred over soap.
Nisha Agarwal 6 years, 1 month ago
Posted by Aviral Goyal 6 years, 1 month ago
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Yogita Ingle 6 years, 1 month ago
In chemistry, Efflorescence is the loss of water (or solvent) of crystallization from a hydrated or solvated salts to the atmosphere on exposure to sir.
Example: Gypsum (CaSO4.2H2O) is a hydrated solid that in a sufficiently dry environment,will give up it's water to the gas phase and form anhydrite (CaSO4).
Posted by Sadiya Samar 6 years, 1 month ago
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Yogita Ingle 6 years, 1 month ago
1) The peripheral nervous system consists of nerves that arise from the brain and spinal cord.
2) The peripheral nervous system has 43 pairs of nerves of these 12 pairs are called CRANIAL NERVES and the rest of 31 pairs are called SPINAL NERVES.
3) The grey matter of the spinal cord appears like butterfly or in the shape of letter ‘H’. Each segment of the ‘H’ shaped grey matter is called ‘HORNS’.
4) The upper horns are called 'DORSAL HORNS’ and the lower horns are called ‘VENTRAL HORNS’.
5) The sensory fibres originate from the dorsal horn of the spinal cord; They carry information from body organs to spinal cord.
6) The motor, fibres take their origin from the ventral horns of the spinal cord. These
supply information required for the movements of the muscles.
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Bharat Patel 6 years, 1 month ago
1Thank You