Please select a subject first
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How would you test whether a piece of steel was magnetised
(i) If you had a magnet?
(ii) If there was no magnet available.
Concept: undefined >> undefined
Give scientific reason:
A ' cracking' noise may be heard on removing a nylon shirt, blouse, or stockings.
Concept: undefined >> undefined
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Give scientific reason:
A charge can be obtained on a rubbed ebonite rod held in the hand but not on a rubbed metal rod held in the hand.
Concept: undefined >> undefined
Can sound propagate in solids and liquids?
Concept: undefined >> undefined
What is the approximate value of the speed of sound in air at N.T.P.?
Concept: undefined >> undefined
Does the speed of sound in a gas depend on the pressure of the gas?
Concept: undefined >> undefined
What are the requisites of the medium for the propagation of sound? Briefly, explain them.
Concept: undefined >> undefined
Explain the effect of density on the speed of sound.
Concept: undefined >> undefined
What is the audible range of frequency?
Concept: undefined >> undefined
Can we hear sounds of frequencies:
Less than 20 Hz
Concept: undefined >> undefined
Can we hear sounds of frequencies:
More than 20 KHZ
Concept: undefined >> undefined
Does audible range of frequency vary from person and also with the age of the person?
Concept: undefined >> undefined
How are bats able to avoid obstacles in their way?
Concept: undefined >> undefined
Do all animals have same ranges of audible frequencies?
Concept: undefined >> undefined
Name the Sound of the Frequency Given Below:
2000 Hz
Concept: undefined >> undefined
Name the Sound of the Frequency Given Below:
45 kHz
Concept: undefined >> undefined
What is the relation between joule and calorie?
Concept: undefined >> undefined
