Sound

Question 1

Human frequency range

Answer 1

20-20,000 Hz

Question 2

Sound waves, longitudinal or transverse

Answer 2

Logitudinal, direction of wave is same as direction of vibrations

Question 3

Oscilloscopes

Answer 3

Measure time on x axis, The time between each division is adjusted to get a clear trace/ 1 complete cycle. Eg: 1 cycle crosses 4 divisions (each 0.1s). Time period = 0.1 * 4 = 0.4. Frequency = 1/t = 1/0.04 =25 hz