EASY
9th CBSE
IMPORTANT
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A glass ball hanging from the hook of a sensitive spring balance is completely submerged in highly salty water and tap water, one by one. If the readings of spring balance when the ball is in highly salty water and tap water are X and Y respectively, then :

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Important Questions on Sound

HARD
9th CBSE
IMPORTANT
Science for Ninth Class Part 1 Physics>Chapter 5 - Sound>Exercise 3>Q 22
You are given four salt solutions W, X, Y and Z of different concentrations. W is a 20% salt solution, X is a 35% salt solution, Y is a 10% salt solution whereas Z is a 50% salt solution. When a solid suspended from the hook of a spring balance is fully submerged in all these salt solutions, one by one, then the spring balance will show the minimum reading when the solid is immersed in:
EASY
9th CBSE
IMPORTANT
Science for Ninth Class Part 1 Physics>Chapter 5 - Sound>Exercise 3>Q 23
An aluminium ball is fully immersed in distilled water, well water, seawater and inland lake water, one by one. The aluminium ball will appear to suffer the maximum loss in weight when immersed in:
EASY
9th CBSE
IMPORTANT
Science for Ninth Class Part 1 Physics>Chapter 5 - Sound>Exercise 3>Q 24
When an object is fully submerged in strong salty water, it undergoes an apparent:
EASY
9th CBSE
IMPORTANT
Science for Ninth Class Part 1 Physics>Chapter 5 - Sound>Exercise 3>Q 25
If a body tied to a spring balance is fully immersed in a liquid, the apparent loss in its weight:
MEDIUM
9th CBSE
IMPORTANT
Science for Ninth Class Part 1 Physics>Chapter 5 - Sound>Exercise 3>Q 26
In an experiment on determining the speed of a pulse propagating through a stretched string, the stopwatch should be started and stopped at instants corresponding to the ones shown in:

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EASY
9th CBSE
IMPORTANT
Science for Ninth Class Part 1 Physics>Chapter 5 - Sound>Exercise 3>Q 27
When a fresh egg is put into a beaker filled with water, it sinks. When the same egg is put in a strong salty water, then it floats. Which of the following is the incorrect statement in this context?
EASY
9th CBSE
IMPORTANT
Science for Ninth Class Part 1 Physics>Chapter 5 - Sound>Exercise 3>Q 28
When two balls, one of iron and the other of aluminium, are completely immersed in strong salty water, they undergo an equal loss in weight. This shows that iron and aluminium balls have:
EASY
9th CBSE
IMPORTANT
Science for Ninth Class Part 1 Physics>Chapter 5 - Sound>Exercise 3>Q 29
When two solids are put in two pans of a beam balance, they exactly balance each other in air. When the two solids are completely immersed in water along with pans of balance, then they no longer balance each other. Which of the following is the incorrect statement about these balls?