Recent content by jamessmith

A source of sound emits 5.0 mW of acoustic power uniformly in all directions. 1. Calculate the intensity of this sound wave 10.0 m from the source. 2. Find the sound level in decibles 10.0 m from the source. Answers: 1. 4 x 10^-6 W/m^2 ---- I don't know how to get this answer. 2. 66 dB...

A race-car driver is driving in a circle at a fixed velocity. He has a cross hanging down from a string on his rearview mirror. Which of the listed forces impacts the hanging cross as the driver drives around a circle at a fixed velocity? Gravity, Friction, Tension, and Centripetal Force I...

Homework Statement I have a 1 kg ball hanging from rope A, and a 2 kg ball connected to the 1 kg ball by rope B. They are accelerating up at 4.0 m/s^2. I need to know the tension in rope A and rope B. Homework Equations Tension = Fg + ma ? The Attempt at a Solution Rope A: (1 kg...