Repeat this problem, but assume the ambulance and car are going the same direction, with the ambu- lance initially behind the car. the speeds and the frequency of the siren are the same as in the example. find the fre- quency heard by the observer in the car (a) before and (b) after the ambulance passes the car. note:
Answers: 3
Physics, 22.06.2019 02:00
Chapter 23, problem 075 the figure shows a geiger counter, a device used to detect ionizing radiation (radiation that causes ionization of atoms). the counter consists of a thin, positively charged central wire surrounded by a concentric, circular, conducting cylindrical shell with an equal negative charge. thus, a strong radial electric field is set up inside the shell. the shell contains a low-pressure inert gas. a particle of radiation entering the device through the shell wall ionizes a few of the gas atoms. the resulting free electrons (e) are drawn to the positive wire. however, the electric field is so intense that, between collisions with gas atoms, the free electrons gain energy sufficient to ionize these atoms also. more free electrons are thereby created, and the process is repeated until the electrons reach the wire. the resulting "avalanche" of electrons is collected by the wire, generating a signal that is used to record the passage of the original particle of radiation. suppose the radius of the central wire is 24 âµm, the inner radius of the shell 2.3 cm, and the length of the shell 14 cm. if the electric field at the shell's inner wall is 2.8 ă— 104 n/c, what is the total positive charge on the central wire?
Answers: 1
Physics, 22.06.2019 10:40
When the magnetic domains in a material can be aligned, but eventually drift out of alignment, the material is
Answers: 2
Physics, 22.06.2019 13:40
What is the thinnest soap film (excluding the case of zero thickness) that appears black when illuminated with light with a wavelength of 480 ? the index of refraction of the film is 1.34, and there is air on both sides of the film. express your answer in nanometers. hint 1. how to approach th
Answers: 1
Repeat this problem, but assume the ambulance and car are going the same direction, with the ambu- l...
Mathematics, 01.11.2020 23:00
Physics, 01.11.2020 23:00
English, 01.11.2020 23:00
Mathematics, 01.11.2020 23:00
Social Studies, 01.11.2020 23:00
Mathematics, 01.11.2020 23:00
Computers and Technology, 01.11.2020 23:10
History, 01.11.2020 23:10
Mathematics, 01.11.2020 23:10
Social Studies, 01.11.2020 23:10
Mathematics, 01.11.2020 23:10