When the light is incident along the normal on the mirror, which of the following statements is true: Class 8
When the light is incident along the normal on the mirror, which of the following statements is true
In the Fig. 10.24, the cap of a sketch pen is placed behind a convex lens, a concave lens, and a flat transparent glass piece Class 8
In the Fig. 10.24, the cap of a sketch pen is placed behind a convex lens, a concave lens, and a fla
In the Fig. 10.23, the cap of a sketch pen is placed in front of three types of mirrors. Class 8
In the Fig. 10.23, the cap of a sketch pen is placed in front of three types of mirrors. Class 8In t
The Fig. 10.22 shows three different situations where a light ray falls on a mirror: Class 8
The Fig. 10.22 shows three different situations where a light ray falls on a mirror: Class 8The Fig.
A light ray is incident on a mirror and gets reflected by it (Fig. 10.21). The angle made by the incident Class 8
A light ray is incident on a mirror and gets reflected by it (Fig. 10.21).The angle made by the inci
Where are all the lenses used? Class 8
Where are all the lenses used? Class 8Where are all the lenses used? Class 8Answer:Lenses are used i
Since a convex lens converges a light beam, can it also burn a paper? Class 8
Since a convex lens converges a light beam, can it also burn a paper? Class 8Since a convex lens con
Do lenses also converge or diverge the light beam? Class 8
Do lenses also converge or diverge the light beam? Class 8Do lenses also converge or diverge the lig
What changes can be seen in the objects when viewed through lenses? Class 8
What changes can be seen in the objects when viewed through lenses? Class 8What changes can be seen
Are the laws of reflection applicable to spherical mirrors also? Class 8
Are the laws of reflection applicable to spherical mirrors also? Class 8Are the laws of reflection a
We have observed images formed by three types of mirrors - plane, concave, and convex Class 8
We have observed images formed by three types of mirrors - plane, concave, and convex Class 8We have
Where do we find concave and convex mirrors being used in our surroundings? Class 8
Where do we find concave and convex mirrors being used in our surroundings? Class 8Where do we find
How can we distinguish between concave and convex mirrors? Class 8
How can we distinguish between concave and convex mirrors? Class 8How can we distinguish between con
Why is there a curved line on some reading glasses? Class 8
Why is there a curved line on some reading glasses? Class 8Why is there a curved line on some readin
Can we make mirrors which can give enlarged or diminished images? Class 8
Can we make mirrors which can give enlarged or diminished images? Class 8Can we make mirrors which c
On side-view mirrors of vehicles, there is a warning that says "Objects in mirror are closer than they appear". Class 8
On side-view mirrors of vehicles, there is a warning that says "Objects in mirror are closer than th
You are provided with an experimental setup as shown in figures (a) and (b). On keeping the test tube (figure (b) in a beaker Class 8
You are provided with an experimental setup as shown in figures (a) and (b). On keeping the test tub
A block of iron has a mass of 600 g and a density of 7.9g/cm3. What is its volume? Class 8
A block of iron has a mass of 600 g and a density of 7.9g/cm3. What is its volume? Class 8A block of
Reema has a piece of modelling clay that weighs 120g. She first moulds it into a compact Class 8
Reema has a piece of modelling clay that weighs 120g. She first moulds it into a compact Class 8Reem
Object A has a mass of 200 g and a volume of 40 cm3. Object B has a mass of 240 g and a volume Class 8
Object A has a mass of 200 g and a volume of 40 cm3. Object B has a mass of 240 g and a volume Class
Analyse figures (a) and (b). Why does the unpeeled orange float, while the peeled one sinks? Explain. Class 8
Analyse figures (a) and (b). Why does the unpeeled orange float, while the peeled one sinks? Explain
An object has a mass of 400 g and a volume of 40cm3. What is its density? Class 8
An object has a mass of 400 g and a volume of 40cm3. What is its density? Class 8An object has a mas
You have a bottle with a volume of 2 litres. You pour 500 mL of water into it. How much more water can the bottle hold? Class 8
You have a bottle with a volume of 2 litres. You pour 500 mL of water into it. How much more water c
Which one of the following is the most appropriate statement, and why are the other statements not appropriate? Class 8
Which one of the following is the most appropriate statement, and why are the other statements not a
A stone sculpture weighs 225 g and has a volume of 90 cm3. Calculate its density and predict whether it will float Class 8
A stone sculpture weighs 225 g and has a volume of 90 cm3. Calculate its density and predict whether
You pour oil into a glass containing some water. The oil floats on top. What does this tell you? Class 8
You pour oil into a glass containing some water. The oil floats on top. What does this tell you? Cla
The volume of a solid can be measured by the method of displacement, where the solid is ........... Class 8
The volume of a solid can be measured by the method of displacement, where the solid is ...........F
Activity 9.7 Let us measure Class 8
Activity 9.7 Let us measure Class 8Activity 9.7 Let us measure Class 8Table 9.2: Volume of irregular
Activity 9.4 Let us observe and calculate (Page 143) Take a measuring cylinder and observe it carefully Class 8
Activity 9.4 Let us observe and calculate (Page 143). Take a measuring cylinder and observe it caref
Some packets of ghee or oil are labelled with a volume of 1 litre but a weight Class 8
Some packets of ghee or oil are labelled with a volume of 1 litre but a weight Class 8Some packets o
Does temperature affect the solubility of gases in liquids also? If so, how? Class 8
Does temperature affect the solubility of gases in liquids also? If so, how? Class 8Does temperature
Is the mixture of gases in water a uniform or non-uniform mixture? Class 8
Is the mixture of gases in water a uniform or non-uniform mixture? Class 8Is the mixture of gases in
Do gases also dissolve in water? Class 8
Do gases also dissolve in water? Class 81. Do gases also dissolve in water? Class 8Answer:Yes, oxyge
Activity 9.2 Let us experiment (Demonstration Activity) (Page 137) Class 8
Activity 9.2 Let us experiment (Demonstration Activity) (Page 137) Class 8Activity 9.2 Let us experi
Activity 9.1 Let us investigate (Page 136) Class 8
Activity 9.1 Let us investigate (Page 136) Class 8Activity 9.1 Let us investigate (Page 136) Class 8
We know air is a mixture. Would a mixture of gases also be considered a solution? Class 8
We know air is a mixture. Would a mixture of gases also be considered a solution? Class 81. We know
Why are water bottles usually tall and cylindrical in shape instead of spherical? Class 8
Why are water bottles usually tall and cylindrical in shape instead of spherical? Class 8Why are wat
Why do sugar and salt dissolve in water but not in oil? Why is water considered a good solvent? Class 8
Why do sugar and salt dissolve in water but not in oil? Why is water considered a good solvent? Clas
What happens when you add too much sugar to your tea and it stops dissolving? How can you solve this problem? Class 8
What happens when you add too much sugar to your tea and it stops dissolving? How can you solve this
What do you think is happening in the picture ? Class 8
What do you think is happening in the picture? Class 8What do you think is happening in the picture?
How can gold be classified as both a mineral and a metal? Class 8
How can gold be classified as both a mineral and a metal? Class 8How can gold be classified as both
Write the names of any two compounds made only from non-metals, and also mention two uses of each of them. Class 8
Write the names of any two compounds made only from non-metals, and also mention two uses of each of
Analyse Fig. 8.24. Identify Gas A. Also, write the word equation of the chemical reaction. Class 8
Analyse Fig. 8.24. Identify Gas A. Also, write the word equation of the chemical reaction. Class 8An
How would our daily lives be changed if water were not a compound but a mixture of hydrogen and oxygen? Class 8
How would our daily lives be changed if water were not a compound but a mixture of hydrogen and oxyg
Is it possible for a substance to be classified as both an element and a compound? Class 8
Is it possible for a substance to be classified as both an element and a compound? Class 8Is it poss
What new substance is formed when a mixture of iron filings and sulfur powder Class 8
What new substance is formed when a mixture of iron filings and sulfur powder Class 8What new substa
Classify the following as elements, compounds, or mixtures in Table 8.3 Class 8
Classify the following as elements, compounds, or mixtures in Table 8.3 Class 8Classify the followin
Iron reacts with moist air to form iron oxide, and magnesium burns in oxygen Class 8
Iron reacts with moist air to form iron oxide, and magnesium burns in oxygen Class 8Iron reacts with
In which of the following cases are all the examples correctly matched? Give reasons in support of your answers. Class 8
In which of the following cases are all the examples correctly matched? Give reasons in support of y
Water, a compound, has different properties compared to those of the elements oxygen Class 8
Water, a compound, has different properties compared to those of the elements oxygen Class 8Water, a