A sound whispered at one focus of a whispering gallery can be heard at the other focus. Two people are standing in a whispering gallery whose cross section is a semielliptical arch with a height of 28 feet and a width of 90 feet. How far from the room's center should they stand so that they can whisper back and forth and be heard?

An observer that stands still as the electron moves by him, will observe

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final

A1.5m wire carries a 2 a current when a potential difference of 52 v is applied. what is the resistance of the wire?