39. 2074 Supp Q. No. 11 in a resonance air column apparatus, the first and second resonance positions were observed at
18 cm and 56 cm respectively. The frequency of tuning fork
used was 480 Hz. Calculate the velocity of sound in air and
end correction of the tube.
[4]​

Apossible long term health effects of stress would be work

We have no idea what the graph shows, or why it may be accurate,  because we can't see the graph.on a different subject, choice ' d ' is the only true statement among the choices.

The boat's velocity relative to the riverbank can be resolved into two components. the component going north is 2.7 m/s and the component going west is 1.2 m/s.we add these two vectors and then find the magnitude of the resultant to get the speed.the magnitude of the resultant vector from adding can be obtained by the pythagorean theorem.    to two significant figures, the boat's speed relative to the riverbank is 3.0 m/s.