Find the amplitude (in m) of such a sound wave if its frequency is 800.0 Hz, the density of air is 1.29 kg/m3 and the speed of sound is 344 m/s. Again, show the algebraic version of the formula you used in your calculation.

The brightest star in the night sky in the northern hemisphere is sirius. its distance from earth is estimated to be 8.7 light years. a light year is the distance light travels in one year. light travels at a speed of 3.00 × 108 m/s. calculate the distance from earth to sirius in miles. (1 mi = 5280 ft) g