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Jiptesh answered 10 month(s) , 6 day(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
  • 31 Likes
  • 126202 Views
Syeda answered 1 year(s) , 1 month(s) ago

Give examples to show that friction is both a friend and a foe.

Friction can be both friend and foe.
FRIEND:
1 It helps in construction of buildings.
2 It helps in walking on the ground.
FOE:
1 soles of shoe and tyres of vehicles wear...

  • 8 Answers
  • 5 Likes
  • 33631 Views
Rajendra answered 3 year(s) , 5 month(s) ago

In which medium sound travels more faster

sound travels faster in glass than of water and air because sound travel faster in solid than of liquids and gases and vaccum is an empty space through which sound cannot travel through

  • 6 Answers
  • 2 Likes
  • 32096 Views
Sara Batool answered 3 year(s) , 2 month(s) ago

How to prepare for NASA Astronomy olympiad (NAO)? Any related websites or coaching ? Please help

Visit NASA website or try downloading NASA app

Asked by Gautami

Sep 28

  • 9 Answers
  • 4 Likes
  • 26961 Views
Syeda answered 1 year(s) , 1 month(s) ago

what is the difference between natural and artificial magnet ?

THE MAIN DIFFERENCE IS

one is NATURAL and the other is ARTIFICIAL :p

Asked by Subarna

Jan 24

  • 5 Answers
  • 2 Likes
  • 25906 Views
Syeda answered 1 year(s) , 1 month(s) ago

why school bags have wide straps?

we know that there is application of pressure that is
if the contct area is more than pressure is less
if contact area is less than prrrssure is more
if the area of the bag straps is les...

Asked by Sumana

Jun 21

  • 10 Answers
  • 5 Likes
  • 22249 Views
Syeda answered 1 year(s) , 1 month(s) ago

Why do women have shriller voices than men ?

Answer The shrillness of a sound depends upon its frequency and pitch, the higher the pitch the shriller the sound. 
 As the sounds produced by their vocal chords is naturally higher than men....

Asked by Vishal

Oct 22

  • 13 Answers
  • 5 Likes
  • 20446 Views
Amarnathreddy answered 4 year(s) , 10 month(s) ago

A pendulum makes 40 oscillations in 4 seconds. find its time period and frequency.

time period of the pendulum is the time taken for one oscillation.    
time period= time taken for no. of oscillations/ no. of oscillations.
here no. of oscillations= 40,  and time taken= 4secon...

Asked by Ghanashyam

Sep 27

  • 2 Answers
  • 1 Like
  • 16560 Views
Syeda answered 1 year(s) , 1 month(s) ago

RUBBER SUCKER

As the sucker sticks to the smooth surface the air in it goes outside and a partial vacuum is formed in it as the atmospheric pressure acts on it from the outside it is difficult to remove it after sticking to...

Asked by Heba

Jun 24

  • 5 Answers
  • 2 Likes
  • 16159 Views
Syeda answered 1 year(s) , 1 month(s) ago

Why is it difficult to hold a school bag having a strap made of thin and strong string?

Why is it difficult to hold a school bag having a strap made of thin and strong string?
 
Answer:  It is difficult to hold a school bag having a strap made of...

  • 8 Answers
  • 3 Likes
  • 15890 Views
Amarnathreddy answered 4 year(s) ago

Cutting edge of a knife made sharp. Why?

Why does the cutting edge of a knife made sharp?
 
Answer:  The cutting edges of tools like blades, knives etc., are provided with sharp edges to cut the thing...

Asked by Shreenidhi

Jul 9

  • 1 Answer
  • 7 Likes
  • 15624 Views
Sidda commented 5 month(s) , 10 day(s) ago

Explain, why rolling friction is less than sliding friction?

as area of contact is less in the case of rolling than in tha case of sliding

Asked by Ratnadeep

Mar 9

  • 3 Answers
  • 2 Likes
  • 14215 Views
Syeda answered 1 year(s) , 1 month(s) ago

What is the importance of the Pole Star ?

Answer.

The Pole Star, or Polaris, is directly above Earth's North Pole. From our perspective on Earth, every star in the sky pivots around the Pole Star, causing them to rise and set. Because of...

Asked by Shreya

Jul 9

  • 2 Answers
  • 0 Like
  • 12757 Views
Syeda answered 1 year(s) , 1 month(s) ago

why is it difficult to walk on a smooth or wet floor

it is difficult to walk on smooth and wet floor because the friction is less and the required grip is not available so, sometimes we slip on wet floor...........

Asked by Punmaram

Nov 14

  • 7 Answers
  • 0 Like
  • 12665 Views
Ayush kumar commented 3 year(s) , 10 month(s) ago

Why are dams broader at the base than at the top?

Dams are made broader at the base than at the top to withstand the pressure of the water behind it. As the pressure is greatest at the bottom, the dam must be made thickest at its base. 

Asked by Shrinkhla

Sep 12

  • 4 Answers
  • 3 Likes
  • 11753 Views
Himanshu answered 2 year(s) ago

why the shape of an aeeroplane or a ship is streamlined?

Best Answer:    Airplanes are streamlined so that they experience less friction with the air around them as they fly. Friction slows the airplane down and causes it to consume more fuel, so reducing friction is...

Asked by Arunabha

Jul 20

  • 3 Answers
  • 1 Like
  • 11014 Views
Amarnathreddy answered 3 year(s) ago

Mention three simple methods of reducing friction.

not three but two of them are-
use a lubricating material
make the two surfaces smooth in order to reduse friction

Asked by Sanjeev

Jul 9

  • 2 Answers
  • 1 Like
  • 9714 Views
Sanjana answered 3 year(s) , 10 month(s) ago

what will happen if friction vanishes?

we would not be able to do anything as there will be no grip

Asked by Gautami

Jul 3

  • 7 Answers
  • 2 Likes
  • 9387 Views
Gaurav answered 4 year(s) , 5 month(s) ago

what are the applications of multiple reflection by plain mirror?

If a reflected light ray is reflected again on being incident on another surface, it is termed multiple reflections. Multiple reflections are used in periscopes. Periscopes are used in subm...

Asked by Shivani

Mar 10

  • 1 Answer
  • 3 Likes
  • 9159 Views
Janhavi answered 3 year(s) , 7 month(s) ago

Why do heavy vehicles have broad tyres?

Heavy vehicles have broad tyres because broad tyres have large area of contact and less pressure on the ground.  Because of this, heavy vehicles (like tractor) can move even on soft roads and fields without sin...

Asked by Rakshit

Dec 14

  • 1 Answer
  • 1 Like
  • 8872 Views
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