// //]]>
##### Get a free home demo of LearnNext

Available for CBSE, ICSE and State Board syllabus.
Call our LearnNext Expert on 1800 419 1234 (tollfree)
OR submit details below for a call back

clear

Next time you have a doubt while studying, you know where to go. By simply posting your questions on Question & Answer Forum, you can have them answered by academic experts. You can also find related videos and explanations for better understanding.

Hhh answered 1 year(s) , 2 month(s) ago

Find integral of root tan x .

∫√(tan x) dx

Let tan x = t2

⇒ sec2 x dx = 2t dt

⇒ dx = [2t / (1 + t4)]dt

⇒ Integral  ∫ 2t2 / (1 + t4

...

Feb 11

• 14 Likes
• 84413 Views

Feb 11

Swetha answered 1 year(s) , 11 month(s) ago

What is the difference between aquaculture and pisciculture?

Sol:

Aquaculture is salt water or fresh water breeding, rearing and harvesting of aquatic flora and fauna for commercial use.Aquaculture is the cultivation of aquatic products...

Feb 7

• 6 Likes
• 62687 Views

Feb 7

An element has a BCC structure with a cell edge of 288pm.The density of the element is 7.2g/cm3.How many atoms are present in 208g of the element?

Formula units per unit cell Z = 2 for BCC
cubic unit cell lattice parameter a = 288 pm = 288 x10-8 cm

Volume V =  a3 =2.39X10-23cm3</

...

Aug 15

• 7 Likes
• 39825 Views

Aug 15

What is a ballistic galvanometer and what is its principle?

A ballistic galvanometer is a galvanometer specially designed to measure the quantity of charge displaced in a current of short duration (such as in the charging or discharging of a capacitor).  It is a sensiti...

Feb 23

• 6 Likes
• 33249 Views

Feb 23

A hollow metal sphere of radius 5 cm is charged such that the potential on its surface is 10 V. What is the potential at the centre of the ..

In the case of a hollow metal sphere, the electric field inside the shell is zero. This means that the potential inside the shell is constant. Therefore the potential at the centre of th...

Jul 28

• 2 Likes
• 32192 Views

Jul 28

Distinguish between self-induction and mutual induction.

Self-Induction Mutual induction 1. Self-Induction is the characteristic of the coil itself.

2.  When the main current in the coil...

Feb 1

• 7 Likes
• 31666 Views

Feb 1

Priyanshu answered 1 year(s) , 10 month(s) ago

Value of sin 2π?

Sol:
Sin 2π = Sin ( 360° + 0) = Sin 0° = 0.

Jun 24

• 10 Likes
• 26765 Views

Jun 24

The treatment of alkyl halide with KOH leads to the formation of alcohols but in the presence of alcoholic KOH, alkenes are the major products. Explain.

Alkyl chloride in the presence of aqueous KOH gives substitution product .In an aqueous solution, KOH completely ionizes to give hydroxide ions. OH ion is a strong nucleo

...

Jan 14

• 6 Likes
• 26555 Views

Jan 14

How to see the antilog of 15.6 in the antilog table. please describe each step. Actually i have to find the Kc . If log Kc = 15.6. So i m unable to find the antilog of 15.6 .

the no. placed before the decimal becomes power on 10 i.e. 10 to the power 15. Then we have 6 after the decimal point so we have to see .60 in the antilog table
thu

...

May 25

• 3 Likes
• 22346 Views

May 25

What are complementary genes and supplementary genes?

Complementary genes are the genes which are present on different genetic loci but interact with each other to express a single character in combination. That is they both together produc...

May 24

• 2 Likes
• 21818 Views

May 24

Murtaza commented 4 year(s) , 6 month(s) ago

Find the angle between the lines whose direction cosines are given by the equations ?

Sol:
Given lines are 3l + m + 5n = 0

m = - (3l + 5n) -----------(1)

and 6mn - 2nl + 5lm = 0 ----------(2)

Substitute m in equation (2) we obtain
...

Dec 10

• 1 Like
• 21370 Views

Dec 10

The angular momentum of an electron in a hydrogen atom is proportional to (where r is radius of orbit ): a) 1/r1/2 b) 1/r c)..

Radius of the nth orbit r n ∝ n 2/Z      ⇒    n ∝ (r n) ½
Angular momentum L n = nh/(2π) ∝ (r n) ½

So...

Dec 23

• 2 Likes
• 20933 Views

Dec 23

Which is a better mode of reproduction sexual or asexual? Why?

Sexual reproduction is considered to be a better mode of reproduction because it creates a hybrid that has more vigor than the parents. It also leads to variations that enable organisms to adapt to the changing...

Jan 31

• 4 Likes
• 20572 Views

Jan 31

What is one one and onto function? Explain with example

Sol: for x 1 ≠ x 2 or f(x 1) ≠ f(x 2)
3x 1 ≠  3x 2
3x 1  + 2 ≠  3x 2 + 2...

Feb 2

• 0 Like
• 20002 Views

Feb 2

What is the function of tail in sperm?

The sperm cell has a long tail like flagella. The tail is made of protein fibres which contract on alternative sides, giving it a wavelike movement (snake-like motion).  The main functio...

Jan 31

• 2 Likes
• 19987 Views

Jan 31

Kumari sanjana answered 2 year(s) , 3 month(s) ago

Glucose and fructose give the same osazone ? Explain.

Upon hydrolysis, the products glucose and fructose form needle shaped crystals. Three molecules of phenylhydrazine are required, the reaction takes place at first two carbon atoms. The difference in these sugar...

May 23

• 0 Like
• 19699 Views

May 23

Give construction and working of meter bridge.

Meter Bridge consists of a 1 meter long standard resistance wire of uniform cross-section held taut between two ends of metallic strip bent at right angle at the ends. Th...

Mar 19

• 3 Likes
• 19166 Views

Mar 19

0∫π/2 log(sinx)dx

Let I = ∫ 0 π 2 [log(sin x) ]dx   ........(1)
∴ I = ∫ 0 π 2 [log(sin( π 2 - x))]dx                      ∫ a b...

Jan 20

• 0 Like
• 17939 Views

Jan 20

What is the formula of a compound in which the element Y forms hcp lattice and atoms of X occupy 2/3rd of tetrahedral voids?

The number of tetrahedral voids formed is equal to twice the number of atoms of element Y. But only 2/3 of these tetrahedral voids are occupied by atoms of element X.

Therefore the ratio of number of

...

Apr 26

• 1 Like
• 17561 Views

Apr 26

What is microsporangium? Where it is located? Show a labelled diagram.

Microsporangium is the sporangial structure which contains microspores which are the pollen sacs giving rise to male gametes in an angiosperm.
T.S of anther shows the four lobes...

Jan 25

• 0 Like
• 17219 Views

Jan 25

###### Like NextGurukul? Also explore our advanced self-learning solution LearnNext
Offered for classes 6-12, LearnNext is a popular self-learning solution for students who strive for excellence
Explore
Animated Video
lessons
All India
Test Series
Interactive Video
Experiments
Best-in class
books