Question

Q.1. A simple pendulum makes 20 oscillations in 40 seconds. What is the time period
and frequency of its oscillation?
Q.2. Differentiate between infrasonic and ultrasonic sounds.
Q.3. Explain the functioning of human ear.
Q.4. What are vibrating parts of Veena and Tabla?
Q.5. Sonali heard sound of thunderbolt 5 second after she saw flash of lightning. How
far is she from the place where lightning occurs?
Q.6. Mention the differences between audible and inaudible sounds.

Answer 1

Answer:

here it is your answer

Explanation:

Simple Pendulum is a very small heavy metal bob suspended at a point from a firmly fixed support using a single strand thread so that it oscillates freely. The distance between the point of suspension and centre of bob is called the length of the pendulum. 

One oscillation: One complete to and fro motion of the oscillating body is called one oscillation. 

Frequency: It is the number of oscillations made by the body in one second.

Time Period: It is the time taken by a body to complete one oscillation.

Hence, the Frequency and Time period are calculated as follows.

Time period = Time taken by the pendulum/Number of oscillations made by the pendulum.

1020

=2s

Frequency =1/Period

21

=0.5Hz

Hence, the Time period and frequency are 2 seconds and 0.5 Hertz respectively.

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Answer 2

Explanation:

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