A line in a star's spectrum lies at 400.0 nm. In the laboratory, that same line lies at 400.2 nm. How fast is this star moving? Is it moving towards or away from us?

A line in a star's spectrum lies at 400.0 nm. In the laboratory, that same line lies at 400.2 nm. How fast is this star moving? Is it moving towards or away from us?

Note that the diameter of the Milkyway is 100,000 light years. The distance to the Andromeda Galaxy M31 is 2.5 Million light years. Show all the steps taken to get to the answer.

Show all the steps taken to get to the answer.

If you have a car that can accelerate with a=5m/s^-2, how long does it take the car to reach a velocity of v=25m/s^-1 (which is equivalent to 90km/h) ? Show all the steps taken to get to the answer...

Please show all the steps taken to reach the answer.

Show all the steps taken to get to the answer.

At what velocity must a basketball player leave the ground to rise 1.25m above the floor in an attempt to get the ball. Show all the steps taken to get to the answer.

What is the general pattern of the relationship between the distances of the planets from the Sun and their temperature?

Earth's rotational axis precesses with a period of 26,000 years, tracing out a circle in the sky. Currently Polaris marks the location of the north celestial pole (NCP). How long until Alderamin,...

Some Earth facts, reasons why it’s not donut shape.

without knowing it’s a sphere but how do we know it’s not a cube? Why can’t it be a cube

Why don't jovian planets have a surface temperature?

A. Stars concentrated mainly in the north and the south poles B. Approximately the same number of stars in all directions C. A thin disk of stars on the ecliptic D. A thin streak of stars...

Describe how the distances between the orbits of the inner planets compare to the distances between the orbits of the outer planets

if the parallax shift of a star is 0.150 seconds of sarc, what is the distance to the star in light years?

If Venus rotated as fast as earth does.

evidence, known facts

Describe how the distances between the orbits of the inner planets compare to the distances between the orbits of the outer planets.

what features of molecular clouds makes the condition favorable for start formation

The maximum distance between the Sun and Mercury is 7.0 × 10 7 7.0 × 10 7 km while the maximum distance between the Sun and the Earth is 1.5 × 10 8 1.5 × 10 8 km.