You overhear two students discussing the topic of Doppler shift.
Student 1: Since Betelgeuse i...
Physics, 01.03.2020 06:54 thinkerbelly157
You overhear two students discussing the topic of Doppler shift.
Student 1: Since Betelgeuse is a red star, it must be going away from us, and since Rigel is a blue star it must be coming toward us.
Student 2:
I disagree, the color of the star does not tell you if it is moving. You have to look at the shift in wavelength of the lines in the star's absorption spectrum to determine whether
it's moving toward or away from you.
Do you agree or disagree with either or both of the students?
Answers: 2
Physics, 21.06.2019 13:50, shelliecurby
What challenges did you encounter during the circuit training program?
Answers: 3
Physics, 22.06.2019 13:40, mvongphakdy8746
Consider a double atwood machine constructed as follows: a mass 4m is suspended from a string that passes over a massless pulley on frictionless bearings. the other end of this string supports a second similar pulley, over which passes a second string supporting a mass of 3m at one end and m at the other. using two suitable generalized coordinates, set up the lagrangian and use the lagrange equations to find the acceleration of the mass 4m when the system is released. explain why the top pulley rotates even though it carries equal weights on each side.
Answers: 2
Physics, 22.06.2019 19:30, paigehixson342
Coal contains energy. a. light b. kinetic c. chemical d. mechanical
Answers: 1
Mathematics, 03.12.2020 18:30
Social Studies, 03.12.2020 18:30
Biology, 03.12.2020 18:30
Mathematics, 03.12.2020 18:30
English, 03.12.2020 18:30