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 p and replacing your listener with a point that absorbs part of your sound waves. these points are initially separated by ri = 1.90 m. if the background noise increases by δβ = 4.90 db, the sound level at your listener must also increase. what separation rf is then required?

Identify the forces that contribute to the centripetal force on the object in each of the following examples: a. a bicyclist moving around a flat, circular track b. a bicycle moving around a flat, circular track c. a racecar turning a corner on a steeply banked curve

A51 kg woman skis down a hill and her kinetic energy is 9.96e4 j. what is her speed?

According to rutherford's nuclear theory, most of the volume of an atom is , so the volume of a hydrogen atom cannot be mostly due to the proton.according to rutherford's nuclear theory, the core of an atom (nucleus) contains most of of an atom and is , so the majority of the mass of a fluorine atom cannot be due to its nine electrons.according to rutherford's nuclear theory, the number of negatively charged particles outside the nucleus the number of positively charged particles within the nucleus, so a nitrogen atom has 7 protons and 7 electrons, while a phosphorous atom cannot have 15 protons and 150 electrons.word bank: dense, empty space, more than, mass, particles, the same as, less than, positively charged, negatively charged