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A block of size 20 m into 10 into 5 M exerts force of 30 Newton calculate the maximum and minimum pressure exerted by block on ground

Gravitational force exists betweenyou and a building. Why are you pulled towards the building.?

_______ is the process of transferring charge from a charged body to earth.

Why bouyancy increases with increase in volume of the object?

What is meaning of magnitude??

A mechanism of PIL was devised in

Why does a fountain pen leak when it is taken high up in altitude? Does fountain pen require friction to write?

To produce sound we need a medium means molecules. When sound tries to travels through gas then how it can pass between the gas of molecules? I know that sound makes the object (at molecules molecular level-particles) move ,i.e., they vibrate. But why they vibrate or how they vibrate. If sound can't travel through the gaps. I m talking about only has.

Name the medium in which speed of sound is minimum.

A train is running at a uniform speed of 80 kmph, how far it would travel in 1 hour 36 minutes.

A body of mass $2kg$ is moving with an acceleration of $10m/s^2$. The net force acting on the body is

An electrical appliance is rated as 60 W -150 V.

(a) What do you understand by this statement?

(b) How much current will flow through the appliance when in use?

Why are cars, aeroplanes and rockets streamlined?

What will you observe when the metal top of an electroscope is touched with a glass rod which has been rubbed with silk cloth ? Give reason for your answer.

Identify the animal which is capable of hearing infrasound from the following.

Tin cans, used for storing food, are made by electroplating tin onto iron. This is done because

A piece of wood having dimensions 1 m by 2 m by 3 m and 2 kg mass. What is the density of wood? Would the wood float in water? ($d_{water}$
$=1000\frac{kg}{m^3}$

What is quake safe

A person with hypermetropia can read only material kept beyond 25 cm from the eye, why?

Liquids experience

Examples where static friction and fluid friction act at the same time

Two blocks A and B with masses $m$ and $2m$ are held against a vertical wall. The horizontal force applied to both the blocks is $25N$. Assuming coefficient of friction is same in both cases, the correct relation is

In an electroscope, the foil strips that move apart on detecting a charged body would come back to their initial position after some time. Identify the reason.

To see the image of an object formed by a lens, the object and the observer should be:

A liquid having area of free surface A has an orifice at a depth h with an area a, below the liquid surface, then the velocity v of flow through the orifice is:

Why do bubbles appear when a liquid is heated?

Two plane mirrors are placed making an angle ${60}^{\circ }$ in between them. For an object placed in between the mirrors, the number of images formed will be :

(a) 3

(b) 6

(c) 5

(d) infinite

In the following figure a wire of radius r fixed lightly at P and Q. The young’s modulus of the material of the wire is Y and a < L. If it is pulled into the form PRQ the tension in the wire is

It is easy to push an empty box than the same box full of books, because:

Sir/mam.

When a rays of light falls on an uneven object or surface to they get scattered in all directions then how we can see the rough or uneven object or surface?

Why are women's asked not to wear high heels

How will you test that 'tea dust' is not adulterated with iron powder?

The lid of the solar cooker is made up of ______.

21 workers working 5hours a day for 30 days can build a platform of width 150 meters, length 20 meters and height 15 meter. How many days will 24 workers working 7 hours a day will take if they have to build a platform of width 720meter, length 15 meter and height 10 meters?

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