Question

The distance traveled by a sound wave through a substance is proportional to time. The graph shows this relationship for several substances.

Which substances have a unit rate greater than 2 km/s?

Choose all answers that are correct.



A.
cork

B.
glass

C.
lead

D.
titanium

Answer 1

B and D
You simply divide the distance by the time for each substance. The result was greater than 2 for both titanium and glass.
Hope this helps!