A230 g air-track glider is attached to a spring. the glider is pushed in 8.2 cm and released. a student with a stopwatch finds that 13 oscillations take 19.0 s . what is the spring constant? express your answer using two significant figures.

This chart shows characteristics of three different types of waves. which statement is best supported by the information in the chart? wave x and wave y are mechanical waves, and wave z is an electromagnetic wave. wave x and wave y are electromagnetic waves, and wave z is a mechanical wave. wave x and wave z are electromagnetic waves, and wave y is a mechanical wave. wave x and wave z are mechanical waves, and wave y is an electromagnetic wave.