atically when the time expires. Warnings appear when half the time, 5 minutes, 1 minute, and 30 seconds remain. iple Not allowed. This test can only be taken once. empts This test can be saved and resumed at any point until time has expired. The timer will continue to run if you leave the test. npletion Your answers are saved automatically. emaining Time: 1 hour, 19 minutes, 25 seconds. uestion Completion Status: Moving to another question will save this response. |Ques estion 2 10 point A 2.0-m long stretched string fixed at both ends is vibrating at its 4" normal mode of vibration. If the speed of the wave on the string is 78.2 m/s, what is the frequency (in Hz) of the standing wave on the string? Moving to another question will save this response. Moving to another question will save this response. insert prt sc home end F11 F12 F9 F10 F6 F7 FB F4 F5 FZ F3 K A & O O LA @ 5 W 4 N P U O W E RForce This test can be saved and resumed at any point until time has expired. The timer will continue to run if you leave the test. Completion Your answers are saved automatically. Remaining Time: 1 hour, 18 minutes, 15 seconds. Question Completion Status: Moving to another question will save this response. Question 4 A sound source emits 20.0 W of acoustical power spread equally in all directions. The threshold of hearing is 1.0 x 10 2 W/m . What is the sound intensity level (in dB) 18.0 m from the source? A Moving to another question will save this response prise F6 F7 F8 F10 % O 5 OYour answers are saved automatically. Remaining Time: 1 hour, 17 minutes, 53 seconds. [v Qunstion Completion Status: ~---) ' Moving to another question will save this response. F Vgion 5 Aphysics studen'l hears Mu sound waves simultaneously, Om sound has a period of 1 50 ms and the other one a period of 1 53 ms, What is the period (in ms) of the beat due to these V, Remaining Time: 1 hour, 17 minutes, 13 seconds. Question Completion Status: > Moving to another question will save this response. Ques Question 1 10 point The vertical displacement y(x,t) of a string stretched along the horizontal x-axis is given by y(x,t) = (5.00 mm) cos [(6.20 m")x - (6.40 rad/s)t]. What is the distance (in meters) between adjacent crests of the wave? Question A Moving to another question will save this response. PreSC home F7 FB Dll F4 FS F6 F3 % O 7 5 A W O P E R K G H B N M