Question

(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?​

Answer 1

Answer:

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.