A) amplitude |
B) frequency |
C) wavelength |
D) Speed |
A) amplitude |
1). Sound travels at maximum speed in
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2). Sounds cannot travel through
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3). The speed of sound will be highest in
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4). Thunder is heard much after a flash of lightning is seen because
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5). Mach number is used in connection with the speed of
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6). Echoes are produced due to
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7). A clearly separate echo of a sound is heard when the minimum distance of the4 reflecting surface from the source of sound is
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8). The walls and ceiling of an auditorium are covered with fibrous material, such as glass fibre, to
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9). Bats can fly in the dark because
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10). A police van sounding its siren is moving away from an observer. The pith (shrillness) of the sound from the siren relative to its normal pitch is
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