tag:blogger.com,1999:blog-15789884390647992342018-03-06T23:20:55.063+05:30MyRankA user friendly Online Educational Portal, a Mentor to the students and an Ultimate Self Assessment Platform
Bhanu Satapatihttps://plus.google.com/116355447280206428989noreply@blogger.comBlogger646125tag:blogger.com,1999:blog-1578988439064799234.post-26782706511081419922017-06-07T10:43:00.001+05:302017-06-07T10:46:05.064+05:30Riddle 11 [With Answers]
Puzzle 1: What kind of room has no doors or windows?
Answer: Mushroom
Puzzle 2: What kind of tree can you carry in your hand?
Answer: A Palm
Puzzle 3: Which word in the dictionary is spelled incorrectly?
Answer: Incorrectly
Puzzle 4: If you have me, you want to share me. If you share me, you haven't got me. What am I?
Answer: Secret
Puzzle 5: What gets broken withoutsowjanya satapathihttps://plus.google.com/117970606967475058687noreply@blogger.com0tag:blogger.com,1999:blog-1578988439064799234.post-9064161027985782482017-06-07T10:38:00.003+05:302017-06-07T10:38:46.337+05:30Voltage Source across Resistor
V(t) = Vm sin ωt
i(t) = Im sin ωt
And P(t) = v(t) i(t)
P(t) = Vm sin ωt Im sin ωt
Hence, average power is
It is clear that if current or voltage waveform has a frequency of
50 Hz then power waveform has a frequency of 100Hz.
sowjanya satapathihttps://plus.google.com/117970606967475058687noreply@blogger.com0tag:blogger.com,1999:blog-1578988439064799234.post-52190848284488556992017-06-05T11:39:00.002+05:302017-06-07T10:16:11.372+05:30Riddles 11
Riddle 1: What kind of room has no doors or
windows?
Riddle 2: What kind of tree can you carry in
your hand?
Riddle 3: Which word in the dictionary is
spelled incorrectly?
Riddle 4: If you have me, you want to share me.
If you share me, you haven't got me. What am I?
Riddle 5: What gets broken without being held?
sowjanya satapathihttps://plus.google.com/117970606967475058687noreply@blogger.com0tag:blogger.com,1999:blog-1578988439064799234.post-75642859737367302592017-06-05T11:17:00.000+05:302017-06-05T11:17:00.997+05:30First order and first degree differential equations and their geometrical interpretations
A first order and first degree differential equation involves the independent variable x (say), dependent variable y (say) so, it can be put in any one of the following forms:
dy/ dx = f(x, y) or f (x, y) = 0, or f(x, y) dx + g(x, y)dy = 0
Where f(x, y) and g(x, y) are functions of x and y.
Geometrical interpretation
The general from of a first order and first degree differential sowjanya satapathihttps://plus.google.com/117970606967475058687noreply@blogger.com0tag:blogger.com,1999:blog-1578988439064799234.post-42964648685630497632017-06-04T13:28:00.002+05:302017-06-05T11:41:43.802+05:30Riddles 10 [With Answers]
Puzzle - 1:
A
car has to carry an important person across the desert.
There
is no petrol station in the desert and the car has space only for enough petrol
to get it half way across the desert.
There
are also other identical cars that can transfer their petrol into one another.
How
can we get this important person across the desert?
Answer: We need 4 cars
(including the car sowjanya satapathihttps://plus.google.com/117970606967475058687noreply@blogger.com0tag:blogger.com,1999:blog-1578988439064799234.post-46049259988296383532017-06-04T13:08:00.004+05:302017-06-04T13:08:31.543+05:30Diazonium Salts - Methods of Preparation
The
diazonium salts have the general formula RN⁺₂X⁻
where R stands for an aryl group and X- ion may be Cl⁻, Br⁻, HSO⁻₄, BF⁻₄ etc.
Primary
aliphatic amines form highly unstable alkyldiazonium salts.
Primary
aromatic amines form arenediazonium salts which are stable for a short time in
solution at low temperatures (273 - 278 K).
Preparation: Benzenediazonium
chloride is prepared by the sowjanya satapathihttps://plus.google.com/117970606967475058687noreply@blogger.com0tag:blogger.com,1999:blog-1578988439064799234.post-19413433441501772372017-06-03T11:21:00.003+05:302017-06-03T11:21:28.622+05:30Voltage Source across Inductor
V(t) = ωL Im cos ωt
V(t) = XLIm cos ωt
Where; XL = ωL; XL is known as inductance of
circuit and has a unit of “ohm”.
V(t) = XLIm sin (ωt + 90⁰)<!--[if gte msEquation 12]> <![endif]--><!--[if !msEquation]--><!--[endif]-->
And instantaneous power
p(t) = v (t) * i(t)
= Vm cos ωt Im sin ωt
So average power is
Hence in positive half cycle of the power, sowjanya satapathihttps://plus.google.com/117970606967475058687noreply@blogger.com0tag:blogger.com,1999:blog-1578988439064799234.post-12593882851523897542017-06-03T11:07:00.002+05:302017-06-03T11:07:19.204+05:30Riddle 10
Riddle - 1:
A car has to carry an important person across the desert.
There is no petrol station in the desert and the car has space only for enough petrol to get it half way across the desert.
There are also other identical cars that can transfer their petrol into one another.
How can we get this important person across the desert?
Riddle - 2:
Joey leaves his house in the sowjanya satapathihttps://plus.google.com/117970606967475058687noreply@blogger.com0tag:blogger.com,1999:blog-1578988439064799234.post-74830049748536797412017-06-02T11:09:00.002+05:302017-06-02T11:09:05.466+05:30Number Puzzle 4 [With Answers]
1. Which number replaces the question mark?
Answer: 10.
Explanation: Working in columns, the sum of the numbers in each column equals 23.
2. Which number replaces the question mark?
Answer: 7.
Explanation: In each square, multiply the top and bottom numbers together to give a 2 digit result, and put the letters with the numerical values of each digit in the left and sowjanya satapathihttps://plus.google.com/117970606967475058687noreply@blogger.com0tag:blogger.com,1999:blog-1578988439064799234.post-4506669866641006372017-06-02T10:57:00.002+05:302017-06-02T10:57:20.971+05:30Formation of differential equations
Consider a family of
exponential curves (y = Aex), where A is an arbitrary constant for
different values of A, we get different members of the family. Differentiating
the relation (y = Aex) w.r.t.x, we get dy/dx = Aex
Eliminating the arbitrary
constant between y = Aex and dy/dx = Aex, we get
dy/dx = y. This is the differential equation of the family of curves
represented by y = Aex
sowjanya satapathihttps://plus.google.com/117970606967475058687noreply@blogger.com0tag:blogger.com,1999:blog-1578988439064799234.post-33743716686852619252017-06-01T10:54:00.002+05:302017-06-01T10:54:17.665+05:30Number Puzzle 4
1. Which
number replaces the question mark?
2. Which
number replaces the question mark?
3. Which
number replaces the question mark?
4. Which
number replaces the question mark?
5. Which
number replaces the question mark?
sowjanya satapathihttps://plus.google.com/117970606967475058687noreply@blogger.com0tag:blogger.com,1999:blog-1578988439064799234.post-14969084140034135782017-05-31T11:17:00.001+05:302017-05-31T11:21:28.092+05:30Missing Letter puzzle 6 [With Answers]
1. Which letter replaces the question mark?
Answer: M
Explanation: In
each diagram, start with the upper left box, and move anti-clockwise around the others. Letters advance through the alphabet in steps of 7 for the upper left diagram, 8 for the middle, then 9, then 10.
2. Which letter replaces the question mark?
Answer: B
Explanation:
Starting at the top and working sowjanya satapathihttps://plus.google.com/117970606967475058687noreply@blogger.com0tag:blogger.com,1999:blog-1578988439064799234.post-17689846075905568872017-05-31T11:04:00.001+05:302017-05-31T11:04:16.217+05:30Preparation of Amines
1. Reduction of nitro compounds:
Reactants: Nitro compounds
Reagent: H2 in the presence of finely divided nickel, palladium or platinum
Product: Amines
Reactants: Nitro compounds
Reagent: Metals in acidic medium. Reduction with iron scrap and hydrochloric acid is preferred because FeCl2 formed gets hydrolysed to release hydrochloric acid during the reaction. Thus, only a small amount ofsowjanya satapathihttps://plus.google.com/117970606967475058687noreply@blogger.com0tag:blogger.com,1999:blog-1578988439064799234.post-25066659878499962332017-05-28T11:16:00.002+05:302017-05-28T11:16:09.846+05:30Missing letter puzzle 6
1. Which letter replaces the question mark?
2. Which letter replaces the question mark?
3. Which letter replaces the question mark?
4. Which letter replaces the question mark?
5. Which letter replaces the question mark?
sowjanya satapathihttps://plus.google.com/117970606967475058687noreply@blogger.com0tag:blogger.com,1999:blog-1578988439064799234.post-69910689528350533392017-05-28T11:06:00.001+05:302017-05-28T11:06:10.998+05:30Uniform circular motion
If the particle moves in the circle with a uniform speed, we call it a uniform circular motion. In this case, dv/dt = 0 and equation gives .
Thus, the acceleration of the particle is in the direction of , that is, towards the centre. The magnitude of the acceleration is α = ω²r.
Thus, if a particle moves in a circle of radius r with a constant speed v, its acceleration is v²/r directed sowjanya satapathihttps://plus.google.com/117970606967475058687noreply@blogger.com0tag:blogger.com,1999:blog-1578988439064799234.post-18584744626033614922017-05-27T11:37:00.001+05:302017-05-27T11:38:38.040+05:30Puzzle 6 [With Answers]
Puzzle 1: Pick
the odd one out:
Crabcake, Laughing, Calmness, Canopy, Stupid, Hijack, First,
Deft, Happy
Answer: Happy
Explanation: All the words except
"happy" contain three consecutive letters of the alphabet.
Crabcake, Laughing, Calmness, Canopy, Stupid, Hijack, First,
Deft
Puzzle 2: Fill
in the missing pair:
BF CH ?
HO LT
Answer: EK
Puzzle 3: If BDG is sowjanya satapathihttps://plus.google.com/117970606967475058687noreply@blogger.com0tag:blogger.com,1999:blog-1578988439064799234.post-25466231198172564562017-05-27T11:31:00.004+05:302017-05-27T11:31:55.114+05:30Ordinary D.F equations, their order and degree
Differential equation: An equation containing an independent variable, dependent variable and differential coefficient of dependent variable with respect to independent variable is called a differential equation.
Order of a differential equation: The order of a differential Equation is the order of the highest order derivative
appearing in the equation.
For
example, in the equation ,sowjanya satapathihttps://plus.google.com/117970606967475058687noreply@blogger.com0tag:blogger.com,1999:blog-1578988439064799234.post-84836860602101230902017-05-26T12:29:00.001+05:302017-05-26T12:30:30.141+05:30Puzzles 6
Puzzle 1: Pick the
odd one out:
Crabcake, Laughing, Calmness, Canopy, Stupid, Hijack, First,
Deft, Happy
Puzzle 2: Fill in the
missing pair:
BF CH ?
HO LT
Puzzle 3: If BDG is equal to CFJ, then find the
value of EGJ
Puzzle 4: Fill in the sequence:
5 6 9
15 ? 40
Puzzle 5: Fill in the
blanks:
3 3 5
4 4 ? 5
sowjanya satapathihttps://plus.google.com/117970606967475058687noreply@blogger.com0tag:blogger.com,1999:blog-1578988439064799234.post-51875421126788456262017-05-26T12:20:00.002+05:302017-05-26T12:23:21.066+05:30Nucleic Acids
Definition:
⇒ The
particles in nucleus of a cell, responsible for heredity, are called
chromosomes which are made up of proteins and nucleic acids.
⇒ Nucleic
acids are long chain polymers of nucleotides, so they are also called
polynucleotides.
⇒ Examples:
Deoxyribonucleic acid (DNA) & Ribonucleic acid (RNA).
Chemical Composition of Nucleic Acids:
⇒ Each nucleotide has three components: sowjanya satapathihttps://plus.google.com/117970606967475058687noreply@blogger.com0tag:blogger.com,1999:blog-1578988439064799234.post-54972769553552887622017-05-25T11:25:00.002+05:302017-05-25T11:25:31.729+05:30Logic Puzzles 5 [With Answers]
Puzzle-1:
You work at a fruit factory.
There are 3 crates in front of you. One crate contains only apples. One crate contains only oranges. The other crate contains both apples and oranges.
And each crate is labeled. One reads "apples", one reads "oranges", and one reads "apples and oranges". But the labeling machine has gone crazy and is now labeling all boxes incorrectly. If you can sowjanya satapathihttps://plus.google.com/117970606967475058687noreply@blogger.com0tag:blogger.com,1999:blog-1578988439064799234.post-26880661334704377192017-05-25T11:14:00.001+05:302017-05-25T11:14:31.074+05:30Total Internal Reflection
When light travels from an optically denser medium to a rarer medium at the interface, it is partly reflected back
in to the same medium and partly refracted to the second medium. This reflection is called the internal reflection.
When a ray of light enters from a denser medium to a rarer medium. It bends away from the normal, for example, the ray AO₁B in figure. The incident ray AO₁ is sowjanya satapathihttps://plus.google.com/117970606967475058687noreply@blogger.com0tag:blogger.com,1999:blog-1578988439064799234.post-64104363569761600502017-05-24T12:34:00.002+05:302017-05-24T12:37:34.326+05:30Logic Puzzles 5
Puzzle-1:
You work at a fruit
factory.
There are 3 crates in
front of you. One crate contains only apples. One crate contains only oranges.
The other crate contains both apples and oranges.
And each crate is
labeled. One reads "apples", one reads "oranges", and one
reads "apples and oranges".
But the labeling machine has gone crazy and is now labeling all boxes
incorrectly.
If you can sowjanya satapathihttps://plus.google.com/117970606967475058687noreply@blogger.com0tag:blogger.com,1999:blog-1578988439064799234.post-5231796564706865682017-05-24T12:19:00.002+05:302017-05-24T12:19:21.315+05:30Integral Function and its Properties
Let f(x) be a continuous function defined on [a, b], then a function φ(x) defined by for all x ϵ [a, b] is called the integral function of the function f(x).
Property I: The integral function of an integrable function is always continuous.
Property II: if φ(x) is differentiable on (a, b) and φ’(x) = f(x) for all x ϵ (a, b).
Property III: The integral function of an odd function sowjanya satapathihttps://plus.google.com/117970606967475058687noreply@blogger.com0tag:blogger.com,1999:blog-1578988439064799234.post-72005397354623107232017-05-22T16:06:00.004+05:302017-05-22T16:06:36.340+05:30Logic Puzzle 4 [With Answers]
Puzzle-1: You have a basket containing ten apples. You have ten friends, who each desire an apple. You give each of your friend’s one apple.
Now all your friends have one apple each, yet there is an apple remaining in the basket. How?
Answer: You give an apple each to your first nine friends, and a basket with an apple to your tenth friend.
Each friend has an apple, and one of them sowjanya satapathihttps://plus.google.com/117970606967475058687noreply@blogger.com0tag:blogger.com,1999:blog-1578988439064799234.post-6444025247658811672017-05-22T15:42:00.002+05:302017-05-22T15:42:54.443+05:30Types of Polymerization Reactions
1. Addition polymerization (or) chain growth polymerization:
⇒ The molecules of the same monomer or different monomers add together on a large scale to form a polymer.
⇒ The monomers used are unsaturated compounds.
Eg: Alkenes, alkadienes and their derivatives.
⇒ Can take place through the formation of either free radicals or ionic species.
Free radical mechanism: A variety of alkenes sowjanya satapathihttps://plus.google.com/117970606967475058687noreply@blogger.com0