Physics, 27.09.2019 17:30 teacherpreacher
From laboratory measurements, we know that a particular spectral line formed by hydrogen appears at a wavelength of 121.6 nanometers (nm). the spectrum of a particular star shows the same hydrogen line appearing at a wavelength of 121.8 nm.
what can we conclude?
a) the star is moving toward us.
b) the star is moving away from us.
c) the star is getting hotter.
d) the star is getting colder.
e) the "star" actually is a planet.
Answers: 1
Physics, 22.06.2019 01:20
Un jugador de beisbol batea un foul recto en el aire.la pelota deja el bate con una rapidez de 120 km/h. en ausencia de resistencia del aire. ? cual sera la rapidez de la pelota cuando la atrape el catcher
Answers: 1
Physics, 22.06.2019 11:30
(2) (a) you have a simple circuit that consists of only a battery (Ξ΄vbat=1.5v) and two resistors with resistance r1=10Ο and r2=5Ο, connected in series with each other. what is the current running through the battery? (b) you re-arrange your circuit so now r2 is attached in parallel to r1 rather than in series. what is the current running through the battery? (c) you add an additional resistor r3=7Ο on the same branch as r2. what is the current running through the battery? (d) what is the power dissipated in r3?
Answers: 3
Physics, 22.06.2019 18:30
Suppose you plot the distance traveled by an object at various times and you discover that the graph is not a straight line. what does this indicate about the object's acceleration?
Answers: 3
From laboratory measurements, we know that a particular spectral line formed by hydrogen appears at...
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