-> a session.masteringphysics.com/myct/itemView?assignmentProblemlD3D1363028348toffset%3Dnext MasteringPhysics: HW6 Apps (1) ইমাম মাহদী কবে... YouTube to MP3 Co... phone cover for mo... | Online Services Fo... AGARWAL-PHY-166 CHW6 Item 3 A7350-kg railroad car travels alone on a level frictionless track with a constant speed of 19.5 m/s.A 2650-kg load, initially at rest, is dropped onto the car. Part A What will be the car's new speed? Express your answer to three significant figures and include the appropriate units. HA Value Units %3D Submit Request Answer Provide Feedback O Tyna here te search

54. What is the intensity in decibels of a 20 Watt speaker at 50 meters away? Intensity = Power/ Area of Sphere A. 88 dBB. 94 dBC. 98 dBD. 104 dB

ASK YOUR TEACHE DETAILS OBINPHYS8 6.P.009. ........................ ..... ************ l Verify the values given in the textbook for the wavelengths (in air) of the lowest and highest frequencies of sound that people can hear (20 and 20,000 Hz, respectively). (Round your answers to at least three significant figures in meters and assume air temperature to be 20°C.) lowest-frequency wavelength highest-frequency wavelength Submit Answer

Party hearing. As the number of people at a party increases, you must raise your voice for a listener to hear you against the background noise of the other partygoers. However, once you reach the level of yelling, the only way you can be heard is if you move closer to your listener, into the listener's "personal space." Model the situation by replacing you with an isotropic point source of fixed power Pand replacing your listener with a point that absorbs part of your sound waves. These points are initially separated by r = 1.10 m. If the background noise increases by Aß = 4.50 dB, the sound level at your listener must also increase. What separation rț is then required? Number i Units