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?

0\,Hz

2\,Hz

20\,Hz

20000\,Hz

C.Only

340\,Hz

20000\,Hz

50000\,Hz

Question 2mcq

Loudness of sound depends mainly on which property?

A.Amplitude of vibration

B.Frequency only

C.Speed only

D.Echo time only

Question 3mcq

A shrill sound has which property?

A.Only high amplitude

B.Low frequency

C.No frequency

D.High frequency

Question 4mcq

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

A.Stops vibrating forever

B.Needs no medium

C.Bounces back from a surface

D.Turns into light

Question 5mcq

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

A.Colour change

B.Time gap

C.Mass change

D.Temperature drop

Question 6mcq

Which option correctly completes this statement: Reverberation is?

A.Persistence of sound due to multiple reflections

B.Frequency becoming zero

C.Only one vibration

D.No sound in vacuum

Section B: Echolocation, Music and Inquiry

Question 7mcq

How do bats locate objects?

A.Osmosis

B.Distillation

C.Photosynthesis

D.Echolocation

Question 8mcq

What does SONAR use reflected sound to find?

A.Atomic number

B.Plant tissues

C.Underwater objects or depth

D.Mixture concentration

Question 9mcq

In music, pitch is linked with which wave property?

A.Mass number

B.Frequency

C.Solubility

D.Work done

Question 10mcq

In music, loudness is linked with which wave property?

A.Amplitude

B.Valency

C.Inertia

D.Density only

Question 11mcq

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

A.Newton’s laws

B.Cell wall discovery

C.Atomic bomb only

D.Light scattering and Indian science

Question 12mcq

A good sound investigation should measure variables like?

A.Only mass number

B.Only colour

C.Length, tension, frequency or loudness

D.Only taste