Along tube contains air at a pressure of 1.00 atm and a temperature of 77.0 degree c. the tube is open at one end and closed at the other by a movable piston. a tuning fork near the open end is vibrating with a frequency of 500 hz. resonance is produced when the piston is at distances 18.0, 55.5, and 93.0 cm from the open end. a) from these measurements, what is the speed of sound in air at 77.0 degree c? b) from the result of part a, what is the value of γ? c) these data show that a displacement antinode is slightly outside of the open end of the tube. how far outside is it? express your answer using two significant figures.

A23 kg log of wood begins from rest, 300 m up a sluice (a water track used to transport logs, think of it as an inclined plane with negligible friction) inclined at 20° to the horizontal. after it reaches the flat waterway at the bottom it collides elastically with a 100 kg block of wood initially at rest near the base of the incline. (a) how long does it take the 23 kg log to travel down the incline? (b) what is the speed of the 23 kg log at the bottom of the incline? (c) what are the velocities of both blocks of wood after the collision? (d) what is the total kinetic energy before the collision? (e) what is the kinetic energy of the 23 kg log after the collision? (f) what is the kinetic energy of the 100 kg block of wood after the collision? (g) what is the total kinetic energy after the collision? (h) compare the total initial and total final kinetic energies. is this consistent with what you would expect for elastic collisions? explain!

Write down two additional questions about earth's magnetic field that will make your presentation more informative.

The substances that are necessary for producing of certain hormones and that store and transport vitamins