NEXTSTEP DIAGNOSTIC QUESTION

[RockMcat520]

Can someone explain the answer to this question please? Thanks

Question 28) Which of the following properties explains why sound wave velocity increases as it travels from air to a liquid medium at the same temperature?

A.Kinetic energy of the medium

B.Volume of the medium

C.Density of the medium

D.Bulk modulus of the medium (Answer)

---

Members don't see this ad.

 

[aldol16]

In their explanation they give an equation. Also, sound waves are propagated by matter - that's why sounds can't travel in space. Therefore, A and B cannot be correct. That leaves C and D and there, you need to know that as something gets denser, it gets harder to transmit a sound wave. That's because as molecules are packed tighter together, when the sound vibrates one, it doesn't travel very far before it has to be transferred to the next particle and so on.

 

[Astra]

The speed of sound can be found with this equation:

v = Root ( B/rho)

B: bulk modulus
rho: density of medium.

So, if you increase rho, the denominator increases and this causes the number to get smaller.

If you increase B, the number increases and therefore D is the answer

 

[NextStepTutor_2]

Can someone explain the answer to this question please? Thanks

Question 28) Which of the following properties explains why sound wave velocity increases as it travels from air to a liquid medium at the same temperature?

A.Kinetic energy of the medium

B.Volume of the medium

C.Density of the medium

D.Bulk modulus of the medium (Answer)

If you have anymore questions, feel free to head on over to out specialized forum HERE for any questions regarding our diagnostics or our 10 Full Length MCAT simulations.

Good luck and keep studying!