7) Consider a 2.500 m-long tube that is open on one end in a laboratory on a day when the speed
of sound is 345m/s

a) Sketch the fundamental, or first harmonic, for this tube.

b) How many wavelengths constitute the fundamental?

c) Calculate the frequency of the fundamental.

d) Calculate the frequency of the third harmonic.

Ibelieve that the correct answer is: c. along plate boundaries

Answer the radiant sun;

Iassume the answer is 75 feet. inwards to outwards rather than outwards to inwards. probably be 75.hachures are stokes drawn in direction of the steepest slope. a series of short parallel lines drawn on a map to indicate topographic relief. it is actually called hachures on contour lines. the small marks in the center of the feature are called hachures.observe the picture attached