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Neha has to push a light weight box and Sohit has to push a heavier box on the same floor. Which of the following is true?

The figure given below is divided into 8 equal squares. If the side length of each small square is 1 m, find the area of the shaded region.

Which of the following statement is TRUE?

What are the advantages and disadvantages of using a rod of given length as a unit of length ?

I want to know about heating effect

What is the principle on which an electromagnet is made?

Write the definition of regular reflection and irregular reflection.

1. 24

Which of the following wires made of same material will have higher resistance?

1.what is the time period of an vibrating object

2. What is meant by the frequency of a sound wave

Why it is necessary to measure time?

Hotness and coldness are

The energy possessed by a magnet is called ___.

Two blocks of the same thickness and thermal conductivities $k_{1}and{k}_2$ are placed in contact. Their outer surfaces are kept at constant temperatures $T_{1}and{T}_2$. If $T_2$ > $T_1$, and $k_2$ > $k_1$ the temperature of the interfaces in the steady state will be

Dry O₂ is:

Question 10

State whether the following statements are True or False:
(i) If wind flows from land to the ocean, then it is daytime.
(ii) A very high pressure system, with very high speed wind surrounding it forms a cyclone.
(iii) The coast line of India is not vulnerable to cyclones
(iv) Warm air is lighter than cool air.

With which of the following can we compare to the flow of electrons?

Question 1 (v)
Classify the following as motion along a straight line, circular or oscillatory motion:
(v) Motion of the hammer of an electric bell.

An ant drags a piece of a sweet from origin $(0,0)$ to $(3,4)$ in the co-ordinate axes. What is the work done by the ant if it applies a force of $1N$ and takes the shortest path?
$(1\text{unit}=1\text{metre}$)

Metal cap of an electric cell is the __________.

Question 14

When the chemicals in the electric cell are used up, the electric cell stops producing electricity. The electric cell is then replaced with a new one. In case of rechargeable batteries (such as the type used in mobile phones, camera and inverters), they are used again and again. How?

Describe the constellation Orion. [5 MARKS]

The bluish colour of water in deep sea is due to __________.

The figure below shows the position of a ball at t = 0, t = 1s, t = 2s, t = 3 s and t = 4s

Which of the following position-time graph is possibly correct for the situation shown above.

Match the components in column I with the percentage by volume in column II as per the composition of air. Which of the following options are correct for the above table:

If the mass of a ball is $5kg$ on the Earth, then what would be its mass on Saturn?

1. ​​​​​​Distance
2. Speed
3. Mass
4. All the above

What is the retardation

Question 1 (iv)
Classify the following as motion along a straight line, circular or oscillatory motion:
(iv) Motion of a child on a see-saw.

As we go upward the atmospheric pressure___.

A front end loader applied 150 N of force to lift a stone and 1250 joules of work was done. How high was the rock lifted?

Guitar and violin are both stringed instruments . What is the basic difference in playing these two instrumenys

The formation of rainbow is an example of _____________of light

The property of a conductor due to which it opposes the flow of current is known as:

Statement 1: Force acting on a body increases its kinetic energy from 200 J to 400 J and the force does a positive work on the body.

Statement 2: A force does a positive work on an object when the displacement due to the force is in the direction of the force itself.

The magnetic effect of electric current was first observed by _____________.

A body moving in the same direction is said to be in uniform motion if:

Consider a constellation of 3 stars, A, B and C forming a right triangle with angle ABC = 90^o and angle BAC = 30^o. If the distance between star A and B is 3√3 x 10¹³ km, then how much time does light take to travel from star C to B with a speed of 3 x 10⁸ m/s?

What are the three modes of heat transfer?

Rooms are fitted with ventilators to let hot air out. What is the phenomenon involved in the above?

Motion under gravity is an example of:

What direction does water exert pressure?

how does changing distance of the object from a convex mirror affect the size and nature of the image is formed by it?

In places of hot climate it is advised to paint the outer walls of houses with white paint. Explain. [3 MARKS]