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When seen from the ground, an apple falling from a tree is under______motion.

When does a wind blow ?

Time taken by a pendulum to complete one oscillation is known as

Which of the following unit is used for the area of a surface?

Q15. Consider the following statements about Emergency Response Support System:

1. It aims to integrate all emergency numbers to 112 with state of art technology.

2. ERSS envisages an integrated computer-aided emergency response platform to respond to distress calls and ensure speedy assistance to the distressed persons.

Which of the above statements are correct?

what is light and what is its nature

What are the causes of floods?

Which amongst the following is an example of non-luminous object?

Which of these is not a characteristic of thunderstorm?

How does an electric
fan manage to throw so much air when it is switched on?

Which of the following properties of plastic help in making bottles to hold water?

Which of the following conditions are favourable for formation of Tropical cyclones are

1. Temperature lower than 18⁰ C

2. Absence of coriolis force

3. High vertical wind shear.

Which of the following options are correct?

A boy observed a circular track with radius $r$ and completed one revolution of the track. Choose the correct statement(s).

A hot tin compresses when ___ water is poured on it.

Match the following:

$\begin{array}{cc}\text{Column I}& \text{Column II}\\ 1.\text{Soldiers in a march past}& A)\text{Periodic Motion}\\ 2.\text{A mark made on the blade of a rotating fan after switching off}& B)\text{Circular Motion}\\ 3.\text{Motion of a swing}& C)\text{Rectilinear Motion}\end{array}$

Select the appropriate option.

What is the speed of dark?

The phenomenon of bending of light as it moves from one medium to another is known as:

Question 11



Prepare a list of objects around you, that are electroplated.

If the earth had no atmosphere then the sky would appear as:

In a bulb, electrical energy is converted into:

In a functional siphon, water rushes from the reservoir to the siphon because____.

Question 19

Suggest some precautions to be taken to prevent the roof of a tin sheet from flying away during a fierce windstorm.

Match the following



$\begin{array}{cc}\text{Colum A}& \text{Colum B}\\ \text{(a) Electric power}& \text{(i) Volt}\\ \text{(a) kWh}& \text{(ii) Joule}\\ \text{(c) Electirc current}& \text{(iii) Volt}\times \text{Ampere}\\ \text{(d) Eelctric energy}& \text{(iv) Watt}\\ \text{(e) Watt}& \text{(v) Ampere}\\ \text{(f) Potential difference}& \text{(vi) Electrical energy}\end{array}$

Raj walk in a room of length 10 m with a speed of 5 km/hr . Express this speed in m/sec

The time period T of a sound wave is 0.020 seconds. What is the frequency f of the vibration?

If there are $5$ minor divisions between two major divisions, one major division representing $1^{\circ }C$, one minor division will be equal to:

Which statement is true about a plane mirror?

Name the state of free fall-

A certain household has consumed 250 units of energy during a month. This energy in joules is .