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Palak Upadhyay 6 years, 7 months ago

Book m dekh lena
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Yash Goswami????? 6 years, 7 months ago

Kiska
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Yogita Ingle 6 years, 7 months ago

Exchange of gases:

(a) Exchange of gases in lungs: It is also called external respiration. In this gaseous exchange oxygen passes from alveoli to pulmonary capillary blood and CO2. Comes to alveoli from pulmonary capillary.

(2) Release of CO2 by the blood: The PCO2 (partial pressure of carbon dioxide) of blood reaching the alveolar capillaries is higher than the PCO2 of alveolar air. Therefore, carbon dioxide diffuses from the blood of alveolar capillaries into the alveolar air.

(b) Exchange of gases in tissues: In the tissues, exchange of gases occurs between the blood and the tissue cells. This exchange occurs via tissue fluid that bathes the tissue cells. The blood reaching the tissue capillaries has PO2 higher than that in the tissue cells and PCO2 lower than that in the tissue cells.

Shivam Kumar 6 years, 7 months ago

Hh
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Pranav Gupta 6 years, 7 months ago

(a) differentiate the functions     (1) d(x)/dt = 3m/s        (2) d(x)/dt = -(4m/s2)*t      (3) d(x)/dt = -(4m/s2)*t           (4) d(x)/dt = 0

         In (2) & (3) velocity is a function of time, so it will not be constant. But in (1) & (4) velocity is constant, although in (4) it is 0.

(b) The direction of vector depends on slope of the function. In (a) we have found slopes of these functions. (slope of x-t graph = velocity). In (2) & (3) velocity is negative so these vectors will point in negative x direction. But in (1) & (4) velocity is non-negative so it will not point in negative x direction.

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Dev Kumar Aidaswani 6 years, 7 months ago

We first take P (n)=1 Then, P (n)=1 (1+1)(1+2) =1 (2)(3) P (n)=6 Therefore 6is divisible by3 So,P (n)is true for 1 Now let us assume k (k+1)(k+2)=3x Now let p (n)=k+1 So, K+1 (K+2)(K+3) SO IF K(K+1)(K+2) IS DIVISIBLE BY 3 SO EITHER ONE OF THEM IS DIVISIBLE BY 3 IF K IS MULTIPLE OF 3 SO IN K+1 (K+2)(K+3) K+3 IS MULTIPLE OF 3 SO THE ABOVE NO. IS DIVISIBLE BY 3 SIMILARILY THE CASE APPLIED WITH K+1 AND K+2 WE GET IN ALL CASES 3 IS DIVISIBLE THEREFORE K (K+1)(K+2) IS DIVISIBLE BY 3 HENCE PROVED
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Yogita Ingle 6 years, 7 months ago

(a - b)2 = a2 - 2ab + b2

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Yogita Ingle 6 years, 7 months ago

Many Sciences developed to describe the physical features of the earth such as Geology, Pedology, Oceanography Botany Zoology and Meteorology & Cultural features of the earth such as Economics, History, Sociology Political Science, Anthropology,

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Yogita Ingle 6 years, 7 months ago

Phagocytosis is the process of digestion of solid substances by cells. In this process, the cell surrounds the particle and engulfs it. The foreign particle is destroyed and its contents broken down. This process is used for ingestion or for destroying the foreign particle or pathogen.

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Gaurav Seth 6 years, 7 months ago

The poem photograph is written by shirley toulson. In this poem  poet remembers the past of  mother  by looking into the picture and recognizing her enjoyable moments with betty,dolly and her uncle at beach holiday. Poets mother was 12 years old with sweet,shinning and laughing face. In this poem "and the sea ,which appears less changed" here is compared to human life as poet mother is no more after 4or 5 decades ;she is in grief ,pain and sorrow about the death of her mom.she compares human life with sea as sea is perrenial,immortal but humal life is mortal and short-lived . Since poet visits the same place where her mother had spent her holiday where she find everything as previous that was before in photo frame. Now at the end of the scene she finds she is left alone leaving all smiles,enjoment ,togetherness and affection behind. ONLY the THING LEFT WITH HER IS SADNESS,pain, GRIEF AND lONELINESS

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Pranav Gupta 6 years, 7 months ago

Atomic mass of  'Iodine' = 127 a.m.u.

To form 1 mole of 'HI' we need 1 mole of 'iodine atoms' is required.

Mass of iodine required = molar mass iodine = 127 grams

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Pranav Gupta 6 years, 7 months ago

Mass of 1 atom of C-14 = 14 a.m.u.

Mass of 1 mole of C-14 = 14 grams

<hr />

(using unitary method)

14 grams = 1 mole

Therefore, 7 grams = 0.5 mole

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1 atom of C-14 has 8 neutrons

0.5 mole of C-14 has 8 * NA 8 * 6.022 * 1023 4.8176 * 1024  neutrons

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Manaswi Raj 6 years, 7 months ago

By solving it with the help of school teacher
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Manaswi Raj 6 years, 7 months ago

6.023×10^23 mol/ion/atom/electron

Rahul Sahoo 6 years, 7 months ago

It is equal to 6.022×10^23 molecules/ions/atoms/electrons
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Vivek Kumar 6 years, 7 months ago

Redox reaction is a reaction in which oxidation and reduction take place simultanously .

Komal Sharma 6 years, 7 months ago

If you want to ask about redox reaction so it is the combination of oxidation and reduction reaction
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Sibi Varghese 6 years, 7 months ago

Physical education makes a person mentaaly, socialy,physicaly strong And leds to develophment of helth
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Manaswi Raj 6 years, 7 months ago

X=-1and-5/3
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Japisher Singh 6 years, 7 months ago

Hm aane wala he bhai .Be prepared

Usha Yadav 6 years, 7 months ago

Expected on 5 may because 12 results are declared today
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Dhama ...? 6 years, 7 months ago

Molarity:-the number of moles of solute dissolve in 1 litre of solution ...and it is denoted by (M)... Molality:-the number of moles of solute dissolve in 1kilogram of solvent..and it is denoted by (m)... Mole fraction:-the ratio of the number of mole of a particular component to the total value of the solution...
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