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If f^{1 }exist if f is
A) one to one function
B) surjective
C) bijective
D) into

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The answer is option A and B
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1. The maximum value of 10x5x^{2}1 is

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4
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Why Vagina's acidity is important?

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As soon as the vaginal pH value is increased above the value of 4.5, bad bacteria take the opportunity to develop and grow, eventually causing an infection. This can result in symptoms such as discharge, odor, itching and other vaginal discomforts. Changes in pH value are often connected to bacterial vaginosis.
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Hello . My doubt is that I want solution ( How to solve it , stepbystep) of the following Question : " if (Alpha)+(Beta)=3 and (Alpha)(Cube)+(Beta)(Cube)=7 , then (Alpha) and (Beta) are roots of equation "........................ .I hope that you would reply me soon .

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A train passes an electric post in 10 sec. and a bridge of length 2km. in 110 second. what is the speed of the engine?

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Ans. Let Length of Train = x meter
Time taken to cover post = 10 sec
if a train pass post. it mean it is covering distance equal to its length
So speed = {tex}{distance \over time } = {x\over 10} \ .... (1){/tex}
Again if it pass a bridge it cover distance equal to sum of length of bridge and length of train.
Length of Bridge = 2 Km = 2000 mSo distance covered = ( 2000 + x ) m
Time taken = 110 sec
So Speed = {tex}{2000+x\over 110 } \ ........... (2){/tex}From (1) and (2), we get
{tex}=> {x\over 10}={2000+x\over 110}{/tex}
=> 110 x = 20000 + 10 x
=> 100x = 20000
=> x = {tex}{20000\over 100} = 200 \ m/s{/tex}
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Give a proper explanation that why tennis ball bounces higher on hills. than in plains

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As from the equation of motions for free fall we have
v^{2}u^{2}=2gh ( at peak point v = 0)
therefore, u^{2} = 2hg
h = u^{2}/2g
As from the above equation h is inversely proportional to g and g on mountains is less from the surface
hence tennis ball bounces more on the mountains than on the plains.
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The molecule of SO2 is four times heavier than that of CH4. Find root mean square velocity of CH4 molecule.

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As Vrms=√3RT/√m
V1/V2=√m2/√m1
=√m2/√4m2
=1/2
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A carnot engine working between 400k and 800k has a work output of 1200 joule per cycle what is the amount of heat energy supplied to the engine from the source per cycle

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First find efficiency of engine = 1 lower temperature/higher temperature = 1/2 then amount of heat energy is two times of work done = 2400 joule
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What is rumination simple way

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Rumination is the process by which the cow regurgitates previously consumed feed and masticates it a second time. The ruminant stomach has four compartments: rumen, reticulum, omasum, and abomasum.
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Two element A of atomic weight 75 and B of atomic weight 16 combine two yield a product the percentage by weight of A in the compound was found to be 75.08 the formula of compound is
Answer A2B3

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Element Percentage by weight Atomic weight Relative no. of atoms Simple ratio A 75.8 75 75.8/75 = 1.01 2 B 24.2 16 24.2/16= 1.51 3 Therefore the formula of the compound is A_{2}B_{3}.
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8 gram of sulphur are burnt to form a SO2 which is oxidised by CL2 water the solution is treated with bacl2 solution the amount of baso4 precipitated is
Answer 0.25mol

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{tex}S+O_2 \to SO_2 \xrightarrow{Cl/H_2O} H_2SO_4 \xrightarrow{BaCl_2} BaSO_4{/tex}
From the above reaction
1mole of S produces 1 mole of BaSO_{4} Number of moles in 8g of S = 8/32 = 0.25 Thus number of moles of BaSO_{4 }= 0.25
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2 moles of mixture of co and co2 requires exactly 56 gram KoH in the solution for complete conversion of all the co2 into K2co3. How much amount more of koh will be required for conversion into k2co3 if 2 moles of mixture is completely oxidized to co2?
A 28g
B 56g
C 168g
D 112g

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The volume of chlorine at STP required to liberate all the bromine and Iodine present in 1 mole of KI and 2 moles of MBR2 is ?
A 22.4
B 56
C 44.8
D 33.6

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4 gm of carbon is heated with 8 gm of sulphur .how much cs2 will be formed when the reaction is complete . What will be the % purity?
A 70.2%
B 79.2%
C 90%
D 90.2%

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B. 79.2%
{tex}C + 2S \to CS_2{/tex}
Ideally, 1 mole of C will react with 2 moles of S to form CS_{2}
1 mol of C = 12g 1 mol of S = 32g
12g carbon reacts with = 64g of Sulphur 1g carbon reacts with = {tex}64\over 12{/tex}g of Sulphur
4g carbon reacts with = {tex}{64\over 12}\times 4 = {64\over 3}{/tex}g of Sulphur
But we have only 8g of sulphur
It mean sulphur is limiting agent.
due to sulphur is limiting reagent reaction will proceed according to sulphur .
64g sulphur formed = 76g CS_{2}
1g S formed= {tex}76\over 64{/tex} g CS_{2}
8g S formed = {tex}{76\over 64 }\times 8 = 9.5{/tex}g CS_{2}
Hence, % purity {tex}= {Wt. \ of \ product \over Wt. \ of \ reactants } \times 100{/tex} = {tex} {9.5 \over (4+8)}\times 100 ={ 9.5\over 12}\times 100 {/tex}
= 79.16 % = 79.2 %
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Suppose evolution on earth has occured in such a way that 96 amino acids instead of 20 .DNA has 12 difrnt types of bases nd DNA synthesis occur in same way as today .the min.no.of bases per DNA codon would be??

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The min.no.of bases per DNA codon would be Two (2)
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 Molality of NaOH is 1.25,percent by weight of NaOH is.......
 The only primary alcohol that can be prepared by the indirect hydration of alkene is.....

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 The only primary alcohol that can be prepared by the indirect hydration of alkene is ethyl alcohol
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 DNAase and RNAase are enzymes produced by....
 In case of taking food rich in lime juice, the action of ptylin on starch is.....
 Fatty acids and glycerol are first absorbed by........

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 DNAase and RNAase are enzymes produced by Pancreas.
 In case of taking food rich in lime juice, the action of ptylin on starch is reduced
 Fatty acids and glycerol are first absorbed by lacteal
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Question 1the resultant of two vectors of magnitude p and 2P is perpendicular to the first <a href="https://www.embibe.com/learn/mathematics/chaptervector412">vector</a>. find the <a href="https://www.embibe.com/learn/physics/conceptangle9428">angle</a> between the resultant and second vector
Question 2  A cart is with moving East speed 1 metre per second A man is walking on this cart with a velocity 2 metre per second with respect to the cart while he moves he swings his left hand with a speed 4 metre per second due West with respect to him. a fly sitting on the man's hand moves with a velocity 6 metre per second due South with respect to the hand .find the velocity of the fly as seen by a ground observer
Question 3 As the angle between two forces of fixed magnitude is varied the greatest and the least value of resultant of two forces are 20 Newtons and 10 Newtons respectively. find the magnitude of the forces

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 Epinasty in flooded plants is due to.......
 synthetic hormone connected with cell expantion is....
 wavelength of light absorbed by P_{r} form of phytochrome is.....

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 Epinasty is caused by ethylene that is released by the leaves when the roots are flooded.
 gibberellin
 The Pr form of phytochrome receives red light (600680 nm) and changes into Pfr.
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consider the reaction given below. this reaction will be the fastest in......
CH_{2}CH_{2}CH_{2}Br + NaCl> CH_{3}CH_{2}CH_{2}CN + NaBr

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This reaction occurs fastest in
N,N'dimethylformamide (DMF).
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 the function of anhydrous AlCl_{3} in the friedel craft's reaction is to ?
 VSEPR NOTATION OF CHLORINE TRIFLUORIDE MOLECULE IS?
 WHAT IS THE TOTAL NOUMBER OF ATOMS PRESENT IN 25.0mg OF CAMPHOR C_{10}H_{16}O

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Solution:
 To Produce electrophile
 VESPR Notation of ClF_{3} is AX_{3}E_{2}. AX_{3}E_{2} has To shaped shape.
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 the maximum probability of finding electron in the dxy orbital is?

Give me the answer of question as early
as possible
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The lobes of d_{xy} orbital are oriented in between the axes at an angle 45, So the probability of finding electron in a d_{xy} orbital is maximum at an angle of 45 degree from x and y axis.
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Consider the ground state of Cr atom the number of electrons with the azimuthal quatum numbers l=1 and 2 are respectively? .........provide best concept material for atomic structure! !!

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1) what is meant by green revolution and blue revolution?
2) Co (or )co2 which one of them is not a green house gas ?

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The Green Revolution was a period when the productivity of global agriculture increased drastically as a result of new advances. During this time period, new chemical fertilizers and synthetic herbicides and pesticides were created. The chemical fertilizers made it possible to supply crops with extra nutrients and, therefore, increase yield.
The term "blue revolution" refers to the remarkable emergence of aquaculture as an important and highly productive agricultural activity. Aquaculture refers to all forms of active culturing of aquatic animals and plants, occurring in marine,or fresh waters.
Carbon monoxide (CO) is only a very weak directgreenhouse gas, but has important indirect effects on global warming. Carbon monoxide reacts with hydroxyl (OH) radicals in the atmosphere, reducing their abundance. So, carbon monoxide is not a green house gas.
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Difference between epimers and annomers?

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Ans.
 Epimers are monosaccharides that differ in chirality at only one carbon.
 Anomers are special epimers; in cyclic forms of one single monosaccharide.
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