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What is force.

Consider the following data: 10 main scale division = 1cm, 10 vernier division match with 9 Main scale division. While measuring the zero error of the vernier we see that zero of vernier scale is to the right of the zero marking of the main scale with $6^{th}$ vernier division coinciding with main scale divisions. The actual reading for length measurement is 4.3 cm with 2nd vernier division coinciding with main scale graduation. Estimate the length.

The unit of resistivity is:

If the speed of a body is $5\frac{m}{s}$, then the time it would take to cover a distance of 6 km is:

A petroleum processing industry suddenly catches fire because of some reason. The employees ran outside and started showering water on the building but the fire did not stop. Which of the following can be used to stop the fire?

Why do mountaineers usually suffer from nose-bleeding at high altitudes?

Name the quantity whose units is 'Newton' (N).

1.The speed of light in a transparent medium is 1.8×10^8m/s. Find the refractive index of that medium.

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The force acting on a unit area of a surface is called

Select appropriate articles for the blanks.

Rosy hit ______ boulder as ______ brakes failed.

How many planets does the solar system have?

Velocity Ratio (V.R) = ( where the velocity of effort $V_E$ and the velocity of load $V_L$)

One kilometre is ____ times the length of one metre.

The squares of the periods of revolution of the planets are proportional to the ___________of their semimajor axis of its orbit.

The magnitude of the charge of a single electron or proton is $1.6\times {10}^{-19}C$. What is the net charge of a particle that has 20 electrons and 22 protons?

A body of weight 50 N is floating in the water. Find its apparent weight?

Why does a helium balloon burst when it rises too high up?

Which of the following is/are precautions to be taken while using electrical appliances?

A force of 50 N is applied on a floor using a stick. Compute the force exerted by the floor on the stick.

We see the lightning flash before we can hear thunder because

The SI unit of thrust is ___.

Question 5 (e)

Are there nine planets in the solar system? Justify!

Look at the pictures given below:

(a)

(b)

(c)

Identify the picture in which friction plays a helpful role.

Which of the following is not an example of normal reaction force?

How is the focal length of a spherical mirror related to its radius of curvature ?

What happens when amber is rubbed with fur?

What will happen if a lightning conductor system is made in such a manner that it just touches the ground?

In which season of the names of Ursa Major constellation.

If Gravitational force exists between two persons standing next to each othet why don't we feel it?

When we pluck the string of a guitar, the music is produced due to

Describe an experiment that you can perform in the laboratory to demonstrate the existence atmospheric pressure .

Dividing 12.36 by 20 gives

Sir,as said that vector quantities measure both direction as well as magnitude and scalor just me sure the direction so on what basis or from what terms these two names vector and scalor are derived

Which of the following are submultiples of a metre?

Match the following:

$\begin{array}{cc}\text{I. Coating solar cooker}\text{with black paint}& \text{a. Causes greenhouse effect}\text{inside the cooker}\\ \text{II. Concave mirror}& \text{b. Absorbs more heat}\\ \text{III. Glass sheet covering}& \text{c. Converge heat at one point}\end{array}$

The angle between the normal at the point of incidence and the incident ray is known as:

Find out the health concerns associated with chromium electroplating. How are people trying to resolve them?

When electric current flows through a metal, it is actually a flow of

$2500kg{m}^{-3}=$ ___ $gc{m}^{-3}$