What will happen to the two identical balloons A and B as shown in Fig. 6.24 when water is filled into the bottle up Class 8
What will happen to the two identical balloons A and B as shown in Fig. 6.24 when water is filled in
Would lightning occur if air and clouds were good conductors of electricity? Give reasons for your answer. Class 8
Would lightning occur if air and clouds were good conductors of electricity? Give reasons for your a
There are two boats, A and B. Boat A has a base area of 7 m2, and 5 persons are seated in it Class 8
There are two boats, A and B. Boat A has a base area of 7 m2 and 5 persons are seated in it Class 8T
An elephant stands on four feet. If the area covered by one foot is 0.25 m2, calculate the pressure exerted Class 8
An elephant stands on four feet. If the area covered by one foot is 0.25 m2, calculate the pressure
Figure 6.23 (a) shows a boy lying horizontally, and Figure 6.23 (b) (see figure in your textbook) Class 8
Figure 6.23 (a) shows a boy lying horizontally, and Figure 6.23 (b) (see figure in your textbook) Cl
State whether the following statements are True (T) or False (F) Class 8
State whether the following statements are True (T) or False (F) Class 8State whether the following
Keep the curiosity alive (Pages 94-96) Choose the correct statement Class 8
Keep the curiosity alive (Pages 94-96) Choose the correct statement Class 8Keep the curiosity alive
Does the difference in air pressure have anything to do with the formation of winds? How do winds form? Class 8
Does the difference in air pressure have anything to do with the formation of winds? How do winds fo
What happens when an inflated balloon is kept without closing its mouth? Class 8
What happens when an inflated balloon is kept without closing its mouth? Class 8What happens when an
When you blow air into a balloon, it gets inflated. Why? Class 8
When you blow air into a balloon, it gets inflated. Why? Class 8When you blow air into a balloon, it
Why does water spurt out like a fountain from leaking joints or holes in water pipes? Class 8
Why does water spurt out like a fountain from leaking joints or holes in water pipes? Class 8Why doe
Do you see any relation between the amount of bulge of the rubber balloon and the height of the water column in the pipe? Class 8
Do you see any relation between the amount of bulge of the rubber balloon and the height of the wate
Do liquids also exert pressure? Class 8
Do liquids also exert pressure? Class 8Do liquids also exert pressure? Class 8Answer:Yes, liquids al
Why are overhead tanks always placed at a height? Class 8
Why are overhead tanks always placed at a height? Class 8Why are overhead tanks always placed at a h
Page 82 Table 6.1: Record your observations Class 8
Page 82 Table 6.1: Record your observations Class 8Table 6.1: Record your observations Class 8Answer
What causes storms and cyclones? If the Earth stopped rotating, would cyclones still form? Class 8
What causes storms and cyclones? If the Earth stopped rotating, would cyclones still form? Class 8Wh
Can air pressure really crush us? Class 8
Can air pressure really crush us? Class 8Can air pressure really crush us? Class 8Answer:While atmos
Why are water tanks usually placed at a height? Class 8
Why are water tanks usually placed at a height? Class 8Why are water tanks usually placed at a heigh
Why are winds stronger on some days than on others? Class 8
Why are winds stronger on some days than on others? Class 8Why are winds stronger on some days than
Three objects, 1,2 and 3 of the same size and shape but made of different materials, are placed in the water. Class 8
Three objects, 1,2 and 3 of the same size and shape but made of different materials, are placed in t
The weight of an object on the Moon becomes one-sixth of its weight on the Earth. What causes this change? Class 8
The weight of an object on the Moon becomes one-sixth of its weight on the Earth. What causes this c
Is any force being applied to an object in a non-uniform motion? Class 8
Is any force being applied to an object in a non-uniform motion? Class 8Is any force being applied t
Why do we sometimes slip on smooth surfaces like ice or polished floors? Explain. Class 8
Why do we sometimes slip on smooth surfaces like ice or polished floors? Explain. Class 8Why do we s
A ball is released from the point P and moves along an inclined plane and then along a horizontal surface as shown Class 8
A ball is released from the point P and moves along an inclined plane and then along a horizontal su
If a ball is thrown upwards, it slows down, stops momentarily, and then falls back to the ground Class 8
If a ball is thrown upwards, it slows down, stops momentarily, and then falls back to the ground Cla
When you drop a coin in a glass of water, it sinks, but when you place a bigger wooden block in water, it floats. Explain. Class 8
When you drop a coin in a glass of water, it sinks, but when you place a bigger wooden block in wate
Two balloons rubbed with a woollen cloth are brought near each other. What would happen and why? Class 8
Two balloons rubbed with a woollen cloth are brought near each other. What would happen and why? Cla
State whether the following statements are True or False Class 8
State whether the following statements are True or False Class 8State whether the following statemen
Keep the curiosity alive (Pages 77-79) Match items in Column A with the items in Column B. Class 8
Keep the curiosity alive (Pages 77-79) Match items in Column A with the items in Column B. Class 8Ke
The gravitational force of the Earth is acting on all objects, then why don't all objects fall to the bottom? Class 8
The gravitational force of the Earth is acting on all objects, then why don't all objects fall to th
If we place some objects on water, some of them float, while others fall to the bottom. Why Class 8
If we place some objects on water, some of them float, while others fall to the bottom. Why Class 8I
What is the difference between weight and mass? Class 8
What is the difference between weight and mass? Class 8What is the difference between weight and mas
Does the Earth pull every object with equal force? Class 8
Does the Earth pull every object with equal force? Class 8Does the Earth pull every object with equa
Is there any force that acts on them? What exerts this force? Class 8
Is there any force that acts on them? What exerts this force? Class 8Is there any force that acts on
Does it mean that there are two kinds of electrical charges? Class 8
Does it mean that there are two kinds of electrical charges? Class 8Does it mean that there are two
Is there any other contact force? Class 8
Is there any other contact force? Class 81.Is there any other contact force? Class 8Answer:Yes. Forc
Why do we feel 'light' or like we are 'floating' just after our swing reaches its highest point and begins to come down? Class 8
Why do we feel 'light' or like we are 'floating' just after our swing reaches its highest point and
Why is it easier to slip on a wet surface? Class 8
Why is it easier to slip on a wet surface? Class 8Why is it easier to slip on a wet surface? Class 8
Why do we feel 'light' or like we are 'floating' just after our swing reaches its highest point and begins to come down? Class 8
Why do we feel 'light' or like we are 'floating' just after our swing reaches its highest point and
Why is it easier to slip on a wet surface? Class 8
Why is it easier to slip on a wet surface? Class 8Why is it easier to slip on a wet surface? Class 8
Why does it feel harder to pedal a bicycle when going uphill than on flat ground ? Class 8
Why does it feel harder to pedal a bicycle when going uphill than on flat ground? Class 8Why does it
Try to make an electric cell using various fruits and vegetables. Also try with Class 8
Try to make an electric cell using various fruits and vegetables. Also try with electrodes of differ
Take two thin nichrome wires of equal length and different thickness approximately one of these wire Class 8
Take two thin nichrome wires of equal length and different thickness approximately one of these wire
Discover, design and debate (Page 61) Make coils of turns 25, 50, 75 and 100 Connect them to the same cell one by one Class 8
Discover, design and debate (Page 61) Make coils of turns 25, 50, 75 and 100 Connect them to the sam
We have four coils, of similar shape and size, made up from iron, copper, aluminium, and nichrome Class 8
We have four coils, of similar shape and size, made up from iron, copper, aluminium, and nichrome as
Neha keeps the coil exactly the same as in Activity 4.4 but slides the iron nail out, leaving only the coiled wire Class 8
Neha keeps the coil exactly the same as in Activity 4.4 but slides the iron nail out, leaving only t
In Fig. 4.11, in which case the LED will glow when the switch is closed? Class 8
In Fig. 4.11, in which case the LED will glow when the switch is closed? Class 8In Fig. 4.11, in whi
Suppose Sumana forgets to move the switch of her lifting electromagnet model to OFF position (in introduction story) Class 8
Suppose Sumana forgets to move the switch of her lifting electromagnet model to OFF position (in int
Look at the Fig. 4.4a. If the compass placed near the coil deflects: Draw an arrow on the diagram to show Class 8
Look at the Fig. 4.4a. If the compass placed near the coil deflects: Draw an arrow on the diagram to
Electric heating devices (like an electric heater or a stove) are often considered more convenient Class 8
Electric heating devices (like an electric heater or a stove) are often considered more convenient C