An audio technician wishes to determine the distance from ground to water level in a well by using an adjustable frequency oscillator in the audio range. Her assistant reports that she is able to establish two successive resonances at 55.26 Hz and 61.14 Hz. (Assume that the speed of sound in air is 343 m/s.)(a) How deep (in m) is the well? m(b) How many antinodes are in the standing wave at 55.26 Hz? antinodes

Which of the following is not am example of a polymer? protein nylon kevlar concreta

A250-n box is at rest on a frictionless horizotal floor. then a person shoves the box with a non-zero force of magnitude p. which statement best describes the relationship betweeen p and the motion of the box after it was shoved? -the box will not move when p< 250n but otherwise will accelerate at a constant rate that is directly proportional to p - the box will begin moving at a speed that is directly proportional to p, then will gradually slow to a halt -the box will move with constant velocity at a speed that is directly proportional to p -box will accelerate across the floor at a constant rate that is directly proportional to p

The uniform slender bar rests on a smooth horizon- tal surface when a force f is applied normal to the bar at point a. point a is observed to have an initial acceleration aa of 20 m/s2, and the bar has a corre- sponding angular acceleration of 18 rad /s2. deter- mine the distance b.