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Question & Answer Forum

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

what are the advantage and disadvantage of friction?

ADVANTAGES OF FRICTION Friction plays a vital role in our daily life. Without friction we are handicap. 1. It is becomes difficult to walk on a slippery road due to low friction. When we move on ice, it  ...

Asked by Smitha

Jun 4

  • 7 Answers
  • 41 Likes
  • 161167 Views
Syeda answered 1 year(s) , 5 month(s) ago

What is the difference between convex and concave mirrors and lens ?

MIRRORS
(1) The reflecting surface of the concave mirror is bulged inwards. But the reflecting surface of the convex mirror is bulged outwards.
(2) Concave mirror produces real and inverted imag...

Asked by Shruti

Nov 27

  • 7 Answers
  • 24 Likes
  • 135407 Views
Syeda answered 1 year(s) , 6 month(s) ago

What is difference between 'g' and 'G'

G stands for Newton's universal gravitational constant, whereas g stands for the acceleration due to gravity at a certain point.
G = 6.67300 × 10-11 N.m2.kg-2, G is a c

...

Asked by Himanshu

Sep 20

  • 4 Answers
  • 49 Likes
  • 112369 Views
Priyanshu answered 1 year(s) , 4 month(s) ago

what is the derivation of mirror formula of concave and convex mirror?

Consider the shown figure where O is a point object and I is corresponding image.
CB is normal to the mirror at B.
By laws of reflection,

For small aperture...

Asked by Chayanika

Nov 16

  • 6 Answers
  • 23 Likes
  • 93986 Views
Syeda answered 1 year(s) , 6 month(s) ago

What is difference between speed and velocity?


Answer.
                      SPEED                     VELOCITY 1. It is defined as the rate of change of distance. It is defined as the rate of change o...

Asked by Ashmit

May 18

  • 2 Answers
  • 13 Likes
  • 83223 Views
Syeda answered 1 year(s) , 5 month(s) ago

Define the following:- (a) Center of curvature (b) Radius of curvature (c) Pole (d) principal axis (e) Principal focus (f) Focal length

Answer.

(a) Centre of curvature is the centre of the sphere of which the spherical mirror is a part. 

(b) Radius of curvature is the linear distance between the pole and the cen

...

Asked by Chandan

Sep 24

  • 2 Answers
  • 14 Likes
  • 82146 Views
Nagender commented 1 year(s) , 6 month(s) ago

brief summary of novel the three men in a boat 1st term

SUMMARY OF THREE MEN IN A BOAT -

Three friends named Jerome, George, and Harris smoke together in their apartment in London. They are all hypochondriacs and discuss their illnesses. After researchin

...

Asked by Dazzler

Jan 12

  • 11 Answers
  • 59 Likes
  • 79440 Views
Syeda answered 1 year(s) , 6 month(s) ago

An electric bulb is rated 220V and 100W. when it is operated on 110V, what will be the power consumed?

P = V 2/R  
If V = 220 V we have

100 W = 220 2/R
R = 220 2/100 Ω = 484 Ω. This is the resistance of the bulb.

When V = 110 V,...

Asked by Sabu

Jun 24

  • 2 Answers
  • 4 Likes
  • 79074 Views
Syeda answered 1 year(s) , 6 month(s) ago

Difference between luminous and non luminous objects.

Luminous Objects:
Luminous Objects are objects which exhibit light in their own.
Examples: - Sun, flame of a burning candle
 
Non- Lu...

Asked by Nidhi

Sep 20

  • 11 Answers
  • 8 Likes
  • 75485 Views
Sai Vijay answered 1 year(s) , 2 month(s) ago

What is the difference between clinical and labratory thermometer?

Clinical thermo meter:  This thermometer is used in Clinics to measure the temperature of human body.
 A clinical thermometer has a temperature range of only 35ºC to 42°C.
...

Asked by Sagar

Aug 7

  • 30 Answers
  • 24 Likes
  • 73894 Views
Anand answered 10 month(s) , 19 day(s) ago

What is the difference between a virtual image and a real image?

The following are the main differences between a real image and virtual image. 

1.A real image can be caught on a screen whereas a virtual image cannot be caught on a screen.
2. A real i...

Asked by Nidhi

Dec 3

  • 15 Answers
  • 18 Likes
  • 68221 Views
Manoharan commented 3 year(s) , 4 month(s) ago

Derivation of equations of motion

Derivation of The Equations of Motion


Derivation of S = ut + ½ at2


Derivation of v2 - u2<...

Asked by Manoharan

Jun 28

  • 1 Answer
  • 14 Likes
  • 65917 Views
Syeda answered 1 year(s) , 6 month(s) ago

Examples of periodic and non-periodic motions

thanks 

Asked by Yash

Nov 6

  • 12 Answers
  • 11 Likes
  • 62347 Views
Syeda answered 1 year(s) , 6 month(s) ago

a farmer moves along the boundary of a square field of side 10 m in 40 seconds.what will be the magnitude of displacement of the farmer at the end of 2 minutes 20 seconds from his initial position?

 
Answer:
Total distance 40m in 40 sec.
Total time taken by the farmer = 2 min 20 sec. =140 seconds.
Total rounds completed= 140/40=3.5 rounds
That mean...

Asked by Mohammed

May 21

  • 8 Answers
  • 4 Likes
  • 59205 Views
Priyanshu answered 1 year(s) ago

what is the uses of convex lens in daily life

Uses of convex lens are:
1) Convex lens is used in microscopes and magnifying glasses to subject all the light to a specific point.
2) Convex lens is used as a camera lens in cameras as they foc...

Asked by Unmukt

Jan 19

  • 6 Answers
  • 5 Likes
  • 57938 Views
Syeda answered 1 year(s) , 5 month(s) ago

Find the dimensions of constant a and b occurig in van der Waal's equation . [p+a/vsq.][v-b]=RT

(P + a/V 2) (V - b) = RT
P is pressure, V is volume and T is temperature.
[P] = [F/A]  = [MLT −2/L 2] = [ML −1T −2]
[V] = [L...

Asked by Neemit

Jul 12

  • 2 Answers
  • 11 Likes
  • 55217 Views
Syeda answered 1 year(s) , 5 month(s) ago

Derive the expression kinetic energy, potential energy

Derivation for the equation of Potenstial Energy:
Let the work done on the object against gravity = W
                 Work done, W = force × displacement...

Asked by Pranesh

Dec 24

  • 3 Answers
  • 6 Likes
  • 50408 Views
Syeda answered 1 year(s) , 5 month(s) ago

Rest and motion are relative terms. Explain

Answer:  Rest and motion are the relative terms because they depend on the observer’s frame of reference.
If an observer is at rest in his or her own frame of reference, but he may be

...

Asked by Maaz

Sep 1

  • 2 Answers
  • 4 Likes
  • 46085 Views
Amandeep answered 9 month(s) , 16 day(s) ago

What are the applications of Archimedes principle?

Applications of Archimedes principle:-
1. Archimedes principle is used to determining the relative density of the substance.
2. Archimedes principle is used in designing ships and submarines.

Asked by Neeraj

Feb 1

  • 4 Answers
  • 6 Likes
  • 45541 Views
Syeda answered 1 year(s) , 6 month(s) ago

How to calculate zero error and least count of spring balance

Least count of a measuring instrument is the least value of physical quantity that can be measured accurately using the instrument.
 
Example:
 ...

Asked by Perminder

Oct 31

  • 3 Answers
  • 2 Likes
  • 44283 Views
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