Volume

Q. How is a Eureka can used to determine the volume of an irregular solid?

Q.

Displacement method is used for measuring the volume of an irregular solid.

Q.

The density of copper is $8.4g/c{m}^3$. What is the volume of $1Kg$ of copper?

Q.

How are loudness and amplitude related?

Q.

What is the capacity of a container?

Q.

Calculate the volume of copper of mass 2000 kg when it's density is 8.4 g/cc.

Q.

The density of copper is 9 g/cm3. Then the volume of 90 g copper is

1. 810 cm3

2. 10 cm3

3. 90 cm3

4. 9 cm3

Q.

The radius of Jupiter is 11 times the radius of the Earth. Calculate the ratio of the volumes of Jupiter and the Earth. How many Earths can Jupiter accommodate?
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Q. The radius of Jupiter is 11 times the radius of the Earth. Calculate the ratio of the volumes of Jupiter and the Earth. How many Earths can Jupiter accommodate?

Q. There is a square plot with side length equal to $13m$. A farmer wanted to grow grass on half his field and plough the remaining land to a depth of $40cm$. Find the volume of land ploughed?

1. 169 m²

2. 52 m²

3. 84.5 m

4. 84.5 m²

Q.

Alexander Graham Bell invented the door bell.

1. True
2. False

Q.

When an object is immersed in water , immerse in water level gives ____ of the object.

Q. The amount of sound energy passing per unit area in unit time is called _______ of sound.

1. frequency
2. wavelength
3. intensity
4. tone

Q.

The volume of a cube of side length $l$ is __.

1. $l^2$

2. $l^3$

3. $2l^3$

4. $l^2/2$

Q.

A hydrometer has a bulb of volume 10.5 cm³ and the area of the cross-section of its stem is 0.3 cm². The hydrometer weighs 13.5 gf. Calculate the density of the liquid if only 4 cm of the length of the stem gets immersed in the liquid.

Q.

The loudness of sound increases on increasing the surface area of the vibrating object.

1. True
2. False

Q.

Volume cannot be defined for irregular objects.

1. True

2. False

Q.

Explain the uses of the reflection of sound.

Q.

The more the area of the vibrating body, the louder the sound.

1. True
2. False

Q.

1) The densityof a liquid is 600g/cm³ . Express it in kg/ m³?

2) Calculate the density of a solid from the following data -

a) mass of solid =72g

b) Initial volume of water in measuring cylinder = 24ml.

Q.

When we have to measure the volume of an irregular object for example when a stone is tied and then dip into water the volume of the string is also noted then the volume should be wrong? Why?

Q. Which of the following time periods of a sound wave would result in the highest pitch?

1. $0.2\text{s}$
2. $0.02\text{s}$
3. $0.1\text{s}$
4. $1\text{s}$

Q. The radius of Jupiter is 11 times the radius of the Earth. Calculate the ratio of the volumes of Jupiter and the Earth. How many Earths can Jupiter accomodate?

Q.

The area of a rectangular piece of a board is $36c{m}^2$. If its thickness is $4cm$, what is the volume of the board?

1. 26 cm

2. 4 cm

3. 9 cm

4. 12 cm

Q. The area of a rectangular piece of board is 36 square centimetre. If its thickness is 4 cm, what is the volume of the board?

Q. The radius of Jupiter is 11 times the radius of the Earth. Calculate the ratio of the volumes of Jupiter and the Earth. How many Earths can Jupiter accomodate?

Q. A person hears 2 sounds -- one of 60dB, 100 Hz and other of 45dB, 700Hz. Which sound will the person receive to be louder?