Problem Set 9 - Waves & Sound Part A Direction: Answer the five given problems completely. Show all calculations - data, conversion, equation/ derivation, substitution with units, calculation, and final answer. Note that after calculation, copy and write the final result as displayed in your calculator. If the result contains more than 4 numbers after the decimal point, copy only the first four (4) numbers - do not round off. Shown below is a list of basic equations that you can use use to solve for the unknown quantities in each of the five given problems. Basic Quantities Basic Equations Period T= Frequency f Wave Velocity /Speed D = fA Intensity 1 = Problem 1 Calculate the period in millisecond (ms) ELECTRICITY of 60-Hz electrical power. (4pq) Problem 2 Determine the wavelength of an earthquake that shakes the city ground you are standing on with a frequency of 10 Hz and gets to another city 84 km away in 0.2 minute. (4pt)Problem 3 A person relaxing on an air mattress in the river rises and falls through one complete cycle every five seconds. The crests of the wave causing the motion are 25 m apart. Calculate (a) the frequency and (b) the speed of the wave. (8pt) Problem 4 Compute the frequency of radio waves transmitted through space at 3 x 10 m/s by the Voyager spacecraft and have a wavelength of 120 mm. (4pt) Problem 5 Estimate the power (in kilowatt, kW) of a wave having intensity 7.14 x 10-4 W/m and area of 35 x 106 m. (4pq)