Questions Asked

koli123able:
An electron in the hydrogen atom makes a transition from the n=2 energy state to the ground state. Find the wavelength in the ultraviolet re…
 updated one month ago
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koli123able:
Find the area bounded by a^2y=x^3,the xaxis and the line x=2a
 updated one month ago
 21 replies
 2 Medals

koli123able:
Derivative need help !!
 updated 4 months ago
 45 replies
 7 Medals

koli123able:
x^2+xy+y^2=0 is a homogeneous equation of degree two , x^2+xy what is this eqn called ?
 updated 7 months ago
 2 replies
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koli123able:
Help plzzz!!!
 updated 10 months ago
 5 replies
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koli123able:
100 gm of KNO_3 is heated to redness. What volume of oxygen at 39°C and 765mm pressure will be evolved ?
2KNO_3 > 2KNO_2 + O_2
 updated 10 months ago
 4 replies
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koli123able:
100 gm of KNO_3 is heated to redness. What volume of oxygen at 39°C
 updated 10 months ago
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koli123able:
Acetic acid contains carbon,hydogen and oxygen. 4324g of sample acetic acid on complete combustion gave 6.21g of CO_2 and 2.54g of H_2O. The…
 updated 10 months ago
 18 replies
 1 Medal

koli123able:
A sound wave of frequency 500Hz in air enters from a region of temperature 25 degrees C to a reagion of temperature 5 degrees C. Calculate t…
 updated 11 months ago
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koli123able:
If a die is rolled 1 time then the probability of getting
1)2 or 5 is ?
2) that, 6 does not occur is?
 updated 11 months ago
 23 replies
 3 Medals

koli123able:
How is sin(pi/2 + x) equal to cos x ??
 updated 11 months ago
 8 replies
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koli123able:
Product of the n Geometric means b/w a & b is
 updated 11 months ago
 2 replies
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koli123able:
If the order of two matrices A & B are mxn & pxm respectively then order of BA is ?
 updated 11 months ago
 11 replies
 4 Medals

koli123able:
M.C.Q's (just to confirm the answers) .....:)
 updated 11 months ago
 25 replies
 1 Medal

koli123able:
If a,b are the roots of equation x^2+3x+4=0 then a+b = ?
…
 updated 11 months ago
 1 reply
 3 Medals

koli123able:
Solve the equation :
 updated 11 months ago
 27 replies
 10 Medals

koli123able:
A 300gm mass at the end of a spring executes Simple Harmonic Motion with a period of 2.4 sec. Find the period of oscillation of 133gm mass a…
 updated 11 months ago
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koli123able:
A compound microscope has an objective and an eyepiece of focal length 1cm and 5cm respectively. The object is located at a distance of 1.0…
 updated 11 months ago
 8 replies
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koli123able:
A compound microscope has an objective and an eyepiece of focal length 1cm and 5cm respectively. The object is located at a distance of 1.0…
 updated 11 months ago
 24 replies
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koli123able:
The magnifying power of a magnifying glass is 6. What is the power of the lens in dipotres ? What is the best position of the object if a wa…
 updated 11 months ago
 4 replies
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koli123able:
A magnifying glass of what power should be used to obtain an image of magnification 6 ?
 updated 11 months ago
 1 reply
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koli123able:
A magnifying glass of what power should be used to obtain an image of magnification 6 ?
 updated 11 months ago
 10 replies
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koli123able:
Two thin convex lenses are joined together to form a single combined lens. The focal length of one of them is 0.154 cm . If the focal length…
 updated 11 months ago
 8 replies
 1 Medal

koli123able:
Balance the the following Redox Equation :
…
 updated 11 months ago
 41 replies
 1 Medal

koli123able:
At what depth from the surface of the earth is the value of acceleration due to gravity onefourth the value at the earth's surface ?
 updated 11 months ago
 45 replies
 2 Medals

koli123able:
The earth's radius is about 6.4x10^6 m . An object that has a mass of 20kg is taken to a height of 1.6x10^6 m above earth's surface
1) Wha…
 updated 11 months ago
 2 replies
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koli123able:
The planet Jupiter of mass 2x10^27 kg revolves round the sun of mass 2x10^30 kg in a circular orbit of radius 7.8x10^11 m ,Calculate the gra…
 updated 11 months ago
 28 replies
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koli123able:
Modulus & Conjugate of :
 updated one year ago
 9 replies
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koli123able:
Solve the equations:
xy=4,
x^2y^2=12
 updated one year ago
 1 reply
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koli123able:
A body goes from 2 m to 12 m mark and back to 10 m mark in 3 seconds its average speed is ?
 updated one year ago
 6 replies
 1 Medal
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