Physics, 20.08.2019 22:30 pg67891012345
Based on your knowledge of the electromagnetic spectrum, why are radio waves considered harmless while ultraviolet waves and x-rays considered harmful?
a) radio waves have longer wavelengths, lower frequency, and lower energy than ultraviolet waves and x-rays.
b) lower energy and higher frequency ultraviolet waves and x-rays is enough to break bonds and damage cells.
c) high frequency and energy of radio waves mean that they penetrate much farther through matter than uv or x-rays.
d) the energy of the lower frequency ultraviolet waves and x-rays is high enough to be considered ionizing radiation.
Answers: 2
Physics, 21.06.2019 22:30, hawleyemily
Select the word from the list that best fits the definition classification of most stars on the h-r diagram
Answers: 1
Physics, 22.06.2019 10:30, markfaerman5408
Carbon is allowed to diffuse through a steel plate 15 mm thick. the concentrations of carbon at the two faces are 0.65 and 0.30 kg c/m^3 fe, which are maintained constant. if the preexponential and activation energy are 6.2 x 10-7 m2 /s and 80,000 j/mol, respectively, compute the temperature at which the diffusion flux is 1.43 x 10^-9 kg/m^2 -s.
Answers: 3
Physics, 22.06.2019 14:30, joslynndiggs
Explain what it means to view something from a frame of reference. provide an example that illustrates your explanation. (4 points)
Answers: 1
Physics, 22.06.2019 14:50, MoogleCaliS
Nitrogen (n2) undergoes an internally reversible process from 6 bar, 247°c during which pν1.2 = constant. the initial volume is 0.1 m3 and the work for the process is 121.14 kj. assuming ideal gas behavior, and neglecting kinetic and potential energy effects, determine heat transfer, in kj, and the entropy change, in kj/s. show the process on a t-s diagram.
Answers: 2
Based on your knowledge of the electromagnetic spectrum, why are radio waves considered harmless whi...
History, 28.09.2019 06:30
Social Studies, 28.09.2019 06:30