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The motion of the guitar string, as shown in the picture is:

A train travels between two stations A and B. While going from A to B, its average speed is 60 km/h, and when coming back from B to A, its average speed is 90 km/h. Find the average speed of the train during the whole journey. [4 MARKS]

The part of the ear that vibrates in response to sound waves is:

If a bar magnet is brought closer to another bar magnet's head. It was observed that they attract each other. What are the poles of part 1 and part 2?

Select the objects which always have a mechanical advantage less than 1.

Siri is standing in front of a plane mirror, her height is $1.8m$. The height of her image formed will be:

Q35) NASA’s New Horizons spacecraft has made history in a mission to explore Pluto (a dwarf planet).Pluto is a part of:

An object that emits its own light is known as _____.

The space between the particles of the matter is ___________force of attraction between them.

The level of water in a beaker______when a spoon full of sugar or salt is added to it.

If one end of an eraser is at 5 cm, and the other end at 8 cm, the length of the eraser is:

In the given figure below, the appropriate terms A and B respectively are:

Which of the following statements is/are correct?

Which of these objects convert rotational force into linear force?

Motion along a straight line is known as __________.

Meteoroids are made up of

Question 8

In which of the following circuits A, B and C given in Fig., the cell will be used up very rapidly?

Some celestial bodies which do not have their own heat and light are known as

The rear of buses and trucks are provided with double wheels or even more. This is provided in order to:

You spill a bucket of soapy water on a marble floor accidentally. Which of the following statements is correct?

What do you mean by a luminous object? Give example. Is moon a luminous object, as it appears bright at night? [3 MARKS]

Question 22

Think of six activities which use electric current. Also name the devices used to perform the activity.
$\begin{array}{cc}Activityyouperform& Device\\ Example;Getlight& Torch\\ -----------& ---------\\ ----------& ---------\\ ----------& ---------\\ ----------& ---------\\ ----------& ---------\end{array}$

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

Which of the following is/are necessary and sufficient condition(s) for pure rotation?

An ideal heat engine exhausting heat at ${77}^{\circ }C$ is to have a 30% efficiency. It must take heat at

___ fuel is formed from the dead remains of living things.

In the process of magentising an iron piece, where will the north pole be formed?

A freely suspended magnetic needle always rests in geographic___________ direction.

How does our dependence on nature changed

What is the number to be dialed in case of fire emergency?

Which of the following motions are along a straight line?

A weightlifter lifts the weight with the help of his hand and has to apply a large force to do this. The force(s) acting on the weights is/are _____

Which of the following is the unit of speed?

What is the meaning of mass of an object

Question 54
In the following question, state whether the given statement is true (T) or false (F).
Among kilo, milli and centi, the smallest is centi.

Mercury takes________earth days to complete one revolution around Sun.

Define temperature and give its unit. [1 MARK]