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What sort of storm is shaped like a funnel and is very destructive when it touches down?

Select the correct statement(s) regarding a wave.

Which instrument is used to measure the weight of an object?

Rahul is standing still with a $5kg$ weight on his head for $5$ hours. The work done is .

We use a soft iron core in an electromagnet. Give a reason.

Which of the following is/are the unit(s) of density?

Question 2 (d)
Mark T if the statement is true and F if it is false:
A real image cannot be obtained on a screen.

The potential energy of a body at rest is minimum when:

Which of the following English letters in uppercase do not show lateral inversion?

Which particle's flow produces electric current in a wire?

Frequency of a sound wave is defined as:

When a light ray strikes on one of the two mirrors that are placed at a right angle to each other, what can be said about the final reflected ray? It is given that the plane of the incident ray and the two normals are the same.

Question 4 (b)

Fill in the blank with a suitable word.

Loudness is determined by the ________of vibration.

In the circuit shown figure switch S can be shifted to position A or Position B. Current through resistance is say i₁ when switch is in position A and i₂ when switch is in position B, then

In a thermometer, there are $100$ major divisions between the freezing point and the boiling point of water. If each major division has $5$ minor divisions, what is the minimum reading that can be taken using the thermometer?

discuss why wearing of more layers of clothes during winter keeps is warmer than wearing just 16 piece of clothing

If 'i' represents the angle of incidence and 'r' represents the angle of reflection then which of the following options is/are true?

Question 1(c)

Answer the following:
A rectangular box has height h cm. Its length is 5 times the height and breadth is 10 cm less than the length. Express the length and the breadth of the box in terms of the height.

If you were driving a car, what type of mirror would you prefer to use for observing traffic at your back and why?

The speed of a car goes down from $40m/s$ to $35m/s$ in $\frac{1}{2}$ seconds. Find the deceleration.

When you bring two metallic objects 1 and 2 in contact, you analyze that no heat transfer happens between them. Give the reason for this?

Question 3 (a)
State whether the following statement is true or false.
(a) Sound cannot travel in vacuum.

A train travels for $30$ minutes with a velocity of $54km/h$ and then for $120$ minutes with a velocity of $72km/h$ in the same direction. Calculate the average velocity of the train.

Question 3

A cuboidal vessel is 10 m long and 8 m wide. How high must it be made to hold 380 cubic metres of a liquid?

Question 3

The movement of the earth's plates causes

(a) cyclones

(b) lightening

(c) earthquake

(d) wildfire

Why is this statement FALSE

During night time, in a pond of water you can see the image of the moon. It is because of the rectilinear propagation of light.

The volume of a sphere is given by $V=\frac{4}{3}\pi R^3$
Where R is the radius of the sphere
Find the change in volume of the sphere as the radius is increased from 20.0 cm to 20.1 cm. Assume that the rate does not appreciably change between R=20.0 cm to R=20.1 cm.

What is the name of the very effective water distribution system used since 400 years ago in Himachal Pradesh?

In the given diagram, points A and B are at the same distance from the free surface and points A and C are at the same distance from the bottom surface. Which of the following relation(s) is/are correct?
($P_A,P_B\text{and}{P}_C$ are the pressure values at points A, B and C)