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Meghna Thapar 5 years, 7 months ago
The air that covers the whole of the Earth like a blanket, is called the atmosphere.
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Yogita Ingle 5 years, 9 months ago
Consider two colliding particles A and B whose masses are m1 and m2 with initial and final velocities as u1 and v1 of A and u2 and v2of B. The time of contact between two particles is given as t.
A=m1(v1−u1) (change in momentum of particle A)
B=m2(v2−u2) (change in momentum of particle B)
FBA=−FAB (from third law of motion)
FBA=m2∗a2=m2(v2−u2)/t
FAB=m1∗a1=m1(v1−u1)/t
m2(v2−u2)/t=−m1(v1−u1)/t
m1u1+m2u2=m1v1+m2v2
Therefore, above is the equation of law of conservation of momentum where, m1u1+m2u2 is the representation of total momentum of particles A and B before collision and m1v1+m2v2 is the representation of total momentum of particles A and B after collision.
Posted by Sanjay Sanjay 5 years, 9 months ago
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Gaurav Seth 5 years, 9 months ago
- The organisms belonging to this group are bilaterally symmetrical.
- The coelomic cavity is reduced in these organisms.
- There is little segmentation.
- They have an open circulatory system.
- They have kidney-like organs for excretion.
- There is a foot that helps for movement.
- Examples of animals belonging to this group are snails and mussels, pila, unio.
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- Sound is a form of energy which is produced by vibration of objects. Vibrations are rapid to and fro motion of an object.
- When a body vibrates, a disturbance is created in the medium by the particles.
- This disturbance travels in the form of waves. This produces sound.
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Yogita Ingle 5 years, 9 months ago
Kidneys are the main organ of the human excretory system. The kidneys are paired organs in each individual. They are the primary excretory organ in humans and are located one on each side of the spine at the level of the liver. They are divided into three regions- the renal cortex which is the outer layer, the renal medulla which is the inner layer and the renal pelvis which is responsible for carrying the urine from the kidney to the ureter. The functional unit of a kidney is called the nephron.
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Atmosphere is essential for life because of the following reasons: It acts as a blanket and keeps the average temperature of the Earth fairly steady by preventing sudden increase in temperature during the day and slowing down the escape of heat into outer space during the night.
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Yogita Ingle 5 years, 9 months ago
The instantaneous formation of a dipole in the molecule of an organic compound due to the complete transfer of shared pi electron pairs to one of the atoms under the influence of an attacking reagent is referred to as the Electromeric effect.
This effect can be observed in organic compounds that contain at least one multiple bond. When the atoms participating in this multiple bond come under the influence of an attacking reagent, one pi bonding pair of electrons is completely transferred to one of the two atoms.
The electromeric effect is a temporary effect that remains as long as the attacking reagent is present and exposed to the organic compound. Once this attacking reagent is removed from the system, the molecule that was polarized goes back to its original state.
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Ajit Kumar 5 years, 9 months ago
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