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, 21.06.2019 21:40, 2003loganreed
Avery hard rubber ball (m = 0.5 kg) is falling vertically at 4 m/s just before it bounces on the floor. the ball rebounds back at essentially the same speed. if the collision with the floor lasts 0.05 s, what is the average force exerted by the floor on the ball?
Answers: 3
Physics, 21.06.2019 23:00, 12camtheman
How is acceleration calculated? a. initial velocity - final velocity / timeb. initial velocity + final velocity / timec. final velocity - initial velocity / timed. final velocity / timele select the best answer from the choices provided0oood00save and exitnextmark this and return
Answers: 1
Physics, 21.06.2019 23:50, BrainzOli7408
Any color picture tube and electric field exerts a net force of magnitude 1.68x 10^-13 n on an electron the rest mass of an electron is 9.11 x 10^-13 what is the electron acceleration?
Answers: 3
Physics, 22.06.2019 07:30, carlinryan
Which of the following is an example of motion in two dimensions?
Answers: 3
From laboratory measurements, we know that a particular spectral line formed by hydrogen appears at...
History, 16.11.2019 06:31
History, 16.11.2019 06:31
Geography, 16.11.2019 06:31
Mathematics, 16.11.2019 06:31
History, 16.11.2019 06:31