Problem 4: You stand at the top of a deep well. To determine the depth, D, of the well you drop a rock from the top of the well and listen for the splash as the rock hits the water's surface. The sound of the splash arrives t = 3.4 s after you drop the rock. The speed of sound in the well is vs = 340 m/s. D Otheexpertta.com @theexpertta.com - tracking id: 9N69-4E-C3-45-84AD-31945. In accordance with Expert TA's Terms of Service. copying this information to any solutions sharing website is strictly forbidden. Doing so may result in termination of your Expert TA Account. Part (a) Enter the quadratic equation for the distance, D, in terms of the time, the acceleration due to gravity, and the speed of sound. Arrange the expression so that the coefficient of the D~ term is 1. Expression : Select from the variables below to write your expression. Note that all variables may not be required. a, p, It, 0, a, D, g, h, j, k, m, P, S, t, V s Part (b) Solve the quadratic equation for the depth of the well, D, and calculate it's value, in meters. Numeric : A numeric value is expected and not an expression. D =Problem 6: The human ear can detect a minimum intensity of /, = 10-12 W/m, which has a sound intensity of 0 dB. Randomized Variables B = 25 dB @theexpertta.com - tracking id: 9N69-4E-C3-45-84AD-31945. In accordance with Expert TA's Terms of Service. copying this information to any solutions sharing website is strictly forbidden. Doing so may result in termination of your Expert TA Account. If the student hears a sound at 25 dB, what is the intensity of the sound? Numeric : A numeric value is expected and not an expression. I =Problem 7: A student hears a sound with a power of P = 22 uW. At their distance from the source, the sound has intensity / = 0.85 W/m2 @theexpertta.com - tracking id: 9N69-4E-C3-45-84AD-31945. In accordance with Expert TA's Terms of Service. copying this information to any solutions sharing website is strictly forbidden. Doing so may result in termination of your Expert TA Account. Part (a) Assuming the eardrum is circular, what is the radius of their eardrum, in meters? Numeric : A numeric value is expected and not an expression. Part (b) Another student stands in the exact same location, but receives 20% more power from the same source. What is the radius of the second student's eardrums? Numeric : A numeric value is expected and not an expression