Homework Practice

Printable assignment

Echoes, Hearing and Sound Applications

Section A: Human Hearing and Reflection

Question 1mcq

What is the approximate audible range for humans?

20000\,Hz

50000\,Hz

0\,Hz

2\,Hz

20\,Hz

20000\,Hz

D.Only

340\,Hz

Question 2mcq

Loudness of sound depends mainly on which property?

A.Echo time only

B.Frequency only

C.Amplitude of vibration

D.Speed only

Question 3mcq

A shrill sound has which property?

A.No frequency

B.High frequency

C.Low frequency

D.Only high amplitude

Question 4mcq

Which option correctly completes this statement: Sound reflection occurs when sound?

A.Turns into light

B.Bounces back from a surface

C.Stops vibrating forever

D.Needs no medium

Question 5mcq

An echo is heard when reflected sound reaches ear after a sufficient?

A.Colour change

B.Mass change

C.Time gap

D.Temperature drop

Question 6mcq

Which option correctly completes this statement: Reverberation is?

A.Only one vibration

B.Frequency becoming zero

C.No sound in vacuum

D.Persistence of sound due to multiple reflections

Section B: Echolocation, Music and Inquiry

Question 7mcq

How do bats locate objects?

A.Distillation

B.Photosynthesis

C.Echolocation

D.Osmosis

Question 8mcq

What does SONAR use reflected sound to find?

A.Plant tissues

B.Underwater objects or depth

C.Mixture concentration

D.Atomic number

Question 9mcq

In music, pitch is linked with which wave property?

A.Frequency

B.Mass number

C.Solubility

D.Work done

Question 10mcq

In music, loudness is linked with which wave property?

A.Inertia

B.Amplitude

C.Density only

D.Valency

Question 11mcq

Which option correctly completes this statement: Sir C.V. Raman is remembered for major contributions to?

A.Newton’s laws

B.Atomic bomb only

C.Light scattering and Indian science

D.Cell wall discovery

Question 12mcq

A good sound investigation should measure variables like?

A.Only mass number

B.Only colour

C.Only taste

D.Length, tension, frequency or loudness