(1) The period of oscillation (T) of the pendulum is measured in minutes.
(2) If the length of the pendulum is increased, its frequency decreases.
(3) The sound produced by a frequency of 4 Hz is audible.
(4) Sonar is a kind of radar system, which makes use of ultrasonic sounds.
(5) The pegs on a sitar are used to adjust frequency of sound. True or False?
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Corrosion is a natural process that converts a refined metal into a more chemically stable form such as oxide, hydroxide, or sulfide. It is the gradual destruction of materials by chemical and/or electrochemical reaction with their environment.
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