Physics, 09.07.2019 06:00, cxttiemsp021
The 21cm (wavelength=0.21 meters) spectral line of neutral hydrogen is one of the most important and observationally useful electromagnetic radiation in galactic astronomy and cosmology. its detection, as well as observations of its doppler shift contribute to astronomers being able to deduct the structure, movement, and mass of galaxies and galaxy clusters throughout the universe. if you were to devise a simple radio antenna capable of detecting the 21cm line, what frequency should it be tuned to? show all steps of your !
Answers: 1
Physics, 22.06.2019 11:00, victoria6929
The charge on an electron is 1.60218 × 10−19 c and its mass is 9.10939 × 10−31 kg. how strong a magnetic field must be experienced by the electron if its path is a circle of radius 5.5 cm? answer in units of t.
Answers: 3
Physics, 22.06.2019 19:40, flore9584
Which of the following is a characteristic shared by both electron and light microscopes? a. they both employ the use of objective lenses. b. both microscopes require an internal camera to visualize the specimen. c. both microscopes have a resolving power of 0.01 nm. d. they both utilize white light to magnify the specimen.
Answers: 2
Physics, 22.06.2019 20:50, isarahweller103
Suppose that a mass of 2 kg is attached a spring whose spring constant is 50. the system is damped such that b = 12 . the mass is set in motion with an initial velocity of -8 m/s at a position 0 meters from equilibrium. set up and solve a differential equation that models this motion. write your solution in the form a cos ( ω t − α ) where α is a positive number. use your solution to fill in the information below: what is the amplitude of the motion? what is the value of ω ? what is the phase shift?
Answers: 1
The 21cm (wavelength=0.21 meters) spectral line of neutral hydrogen is one of the most important and...
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