Physics, 10.10.2019 22:00 monkeys450
From laboratory measurements, we know that a particular spectral line formed by hydrogen appears at a wavelength of 486.1 nanometers (nm). the spectrum of a particular star shows the same hydrogen line appearing at a wavelength of 485.9 nm. what can we conclude?
- the "star" actually is a planet.
- the star is moving away from us.
- the star is getting colder.
- the star is getting hotter.
- the star is moving toward us.
Answers: 1
Physics, 22.06.2019 07:30
Examine the nuclear reacti why is this classified as a nuclear reaction rather than a chemical reaction? it is not balanced. a new compound is formed. a change has occurred in a nucleus. a new element has been formed.
Answers: 2
Physics, 22.06.2019 12:20
Electric field of the earth. the earth has a net electric charge that causes a field at points near its surface equal to 150 n> c and directed in toward the center of the earth. (a) what magnitude and sign of charge would a 60-kg human have to acquire to overcome his or her weight by the force exerted by the earth’s electric field? (b) what would be the force of repulsion between two people each with the charge calculated in part (a) and separated by a distance of 100 m? is use of the earth’s electric field a feasible means of flight? why or why not?
Answers: 2
Physics, 22.06.2019 17:50
Convection occurs when thermal energy is transferred by the movement of
Answers: 1
Physics, 22.06.2019 20:00
Awave has a wavelength of 7 mm and a frequency of 19 hertz. what is its speed?
Answers: 1
From laboratory measurements, we know that a particular spectral line formed by hydrogen appears at...
Mathematics, 05.10.2019 00:30
History, 05.10.2019 00:30
Mathematics, 05.10.2019 00:30
Physics, 05.10.2019 00:30
Chemistry, 05.10.2019 00:30
Mathematics, 05.10.2019 00:30
World Languages, 05.10.2019 00:30
Mathematics, 05.10.2019 00:30
Chemistry, 05.10.2019 00:30
Biology, 05.10.2019 00:30