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Ask QuestionPosted by Khushboo Gupta 5 years, 9 months ago
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Sanjay Kumar 5 years, 9 months ago
Yogita Ingle 5 years, 9 months ago
The odd integers from 1 to 2001 are 1, 3, 5, …1999, 2001.
This sequence forms an A.P.
Here, first term, a = 1
Common difference, d = 2
Here,<nobr>
a+(n−1)d=2001
=>1+(n−1)(2)=2001
=>2n−2=2000
=>n=1001
Sn= n2[2a+(n−1)d]
∴Sn= 10012[2×1+(1001−1)×2]
= 10012 [2+1000 × 2]
=10012×2002
=1001×1001
=1002001</nobr>
Thus, the sum of odd numbers from 1 to 2001 is 1002001.
Posted by Ditin Agrawal 5 years, 9 months ago
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Posted by Mr. Singh 5 years, 9 months ago
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Yogita Ingle 5 years, 9 months ago
P block elements are in which the last electron enters any of the three p-orbitals of their respective shells. Since a p-subshell has three degenerate p-orbitals each of which can accommodate two electrons therefore in all there are six groups of p-block elements.
P block elements are shiny and usually a good conductor of electricity and heat as they have a tendency to lose an electron. You will find some amazing properties of elements in a P-block element like gallium. It’s a metal that can melt in the palm of your hand. Silicon is also one of the most important metalloids of the p-block group as it is an important component of glass.
Posted by Isha Sharma 5 years, 9 months ago
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Saloni Thakur 5 years, 9 months ago
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Saloni Thakur 5 years, 9 months ago
Anmol Khuntia 5 years, 9 months ago
Posted by Mr. Singh 5 years, 9 months ago
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Mr. Badmash 5 years, 9 months ago
Posted by Mr. Singh 5 years, 9 months ago
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Mr. Singh 5 years, 9 months ago
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Sofiyan Sofiyan 5 years, 4 months ago
Jyoti Meena Jyoti Meena 5 years, 9 months ago
Posted by Samida Ruhi 5 years, 9 months ago
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Yogita Ingle 5 years, 9 months ago
Cash book shows all the transactions related to cash receipts and payments. Cash Book serves two purposes. First, all the cash transactions are recorded first time in cash book it becomes BOOK OF ORIGINAL ENTRY. Second, there is no need to prepare Cash a/c in ledger it also play the role of Principal Book.
Posted by Mr. Singh 5 years, 9 months ago
- 1 answers
Yogita Ingle 5 years, 9 months ago
A simple pendulum is just a pendulum made out of a small object attached to a light string. Ideally, it is a “point” particle attached to a massless string which is fixed to a pivot point. If the pendulum is displaced from equilibrium, it swings back and forth, and its motion is periodic.
Posted by Avogadro Rahul 5 years, 9 months ago
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Posted by Abhishek Kumar 5 years, 9 months ago
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Posted by Mr. Singh 5 years, 9 months ago
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Yogita Ingle 5 years, 9 months ago
For a certain chemical reaction, the equilibrium constant is defined as the ratio between the amount of reactant and the amount of product which is used to determine chemical behavior.
At equilibrium, Rate of the forward reaction = Rate of the backward reaction
i.e. rf = rb Or, kf × α × [A]a[B]b = kb × α × [C]c [D]d
At a particular temperature, the rate constants are constant. The ratio of the rate constant of forward reaction to the rate constant of backward reaction should be a constant and is called an equilibrium constant (Kequ).
Posted by Prince Gupta 5 years, 9 months ago
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Posted by Amna Ansari 5 years, 9 months ago
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Yogita Ingle 5 years, 9 months ago
Excitation energy of any orbit can be found out by this formula
En = -13.6/n2
For hydrogen
E1 =-13.6/1
E1=-13.6
Ionization energy is the energy required to remove an electron from the valence shell of any atom , for hydrogen the ionization energy and excitation energy are equal i-e -13.6 eV
Posted by Mr. Singh 5 years, 9 months ago
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Harender Singh 5 years, 9 months ago
Posted by Akash Kumar Bhagat 5 years, 9 months ago
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Raj Parjapati 5 years, 7 months ago
Posted by Prashant Insha 5 years, 9 months ago
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Gaurav Seth 5 years, 9 months ago
The sum of pressure energy , kinetic energy and potential energy of liquid remains constant
Bernoulli's principle states that an increase in the speed of a fluid occurs simultaneously with a decrease in pressure or a decrease in the fluid's potential energy.
Derivation :
Let the velocity, pressure and area of a fluid column at a point A be v₁, p and A₂ and at another point B be v₂, p₂, p₂ and A₂ .
Let the volume that is bounded by A and B be moved to M and N .
let AM = L₁ and BN = L₂ .
Now if we can compress the fluid then we have,
A₁L₁ = A₂L₂
Net work done per volume = p₂ - p₁
Kinetic energy per volume = 1/2 ρ v²
Kinetic energy gained per volume = 1/2 ρ (v₂² - v₁²)
Potential energy gained per volume = ρ g(h₂ - h₁)
Now ,
p₁ - p₂ = 1/2 ρ (v₂² - v₁²) + ρ g(h₂ - h₁)
p₁ - p₂ = 1/2 ρ v₂² - 1/2 ρ v₁² + ρ g h₂ - ρ g h₁
p₁ + 1/2 ρ v₁² + ρ g h₁ = p₂ + 1/2 ρ v₂² + ρ g h₂
p + 1/2 ρ v + ρ g h = constant
Applications :
The top of the airplane wing is a little curved and the bottom is completely flat. But air travels across both parts of the wings simultaneously in the sky.
The entire pitch of the baseball is working on the principle of Bernoulli’s theorem. The stitches of the ball can be seen forming a curve which makes it necessary for the pitcher to grip the ball’s seams.
Mr. Singh 5 years, 9 months ago
Mr. Singh 5 years, 9 months ago
Posted by Sabina Khatun 5 years, 9 months ago
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Mr. Singh 5 years, 9 months ago
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Drake Verma 5 years, 8 months ago
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