Question

help! giving a medal

NASA's Apollo mission in Kennedy Space Center, Florida, ended in 1972. Which of these was the most likely consequence of the end of the Apollo mission in Florida?

increase in unemployment among local people

decrease in the use of space technology in the location

establishment of many restaurants and shops in the vicinity

increase in profit made by local housing and construction industry

Answer 1

if some program closes, a lot of people lose their jobs :)

Answer 2

thank you! you've been a big help. @Iseulde

Answer 3

When Earth moves around the sun, there are small variations in the position of a star as observed from Earth. Which of these is a method for finding accurately the distance from Earth to a star, by calculating these small variations?

Doppler Effect

Parallax Method

HR Diagram

Blue Shift

Answer 4

I hope I remember it right - Doppler Effect. (But wait a little, maybe someone gets here to confirm it, to be 100% sure).

Answer 5

I need help with 2 more and that will be all for today.

One scientist did an experiment with a meter stick and pencil. The steps of the experiment are listed below.

1. Hold a meter stick horizontally with one end on the nose and the other end pointing forward away from the body.
2. Ask a friend to hold a pencil on the 50 cm mark of the meter stick.
3. Look at the pencil and alternately open and close each eye.
4. Observe how the pencil appears to move with respect to background objects.
5. Repeat steps 3 and 4 by asking the friend to hold the pencil at 25 cm and 100 cm marks.

Based on the experiment, what would the scientist most likely conclude?
parallax shift remains the same at all distances of stars from Earth

parallax shift depends on the size of the stars with respect to Earth

parallax would be most effective in measuring distances to stars which are very far away from Earth

parallax would be most effective in measuring distances to stars which are close to the Earth




A star is located at a distance of about 100 million light years from Earth. An astronomer plans to measure the distance of the star by the parallax method. Which of these statements best explains why the astronomer's method of measuring the star distance is inappropriate?

At large distances, a red shift in the star's spectrum causes incorrect measurements.

At large distances, a blue shift in the star's spectrum causes incorrect measurements.

The parallaxes beyond a few thousand light years are too large to be used to measure distances.

The parallaxes beyond a few thousand light years are too small to be measured with common instruments.

Answer 6

well, frankly speaking, I just looked with one eye and then with the other at my finger, placed closer to the body, then farther, but on the same axis. when the finger is closer, the apparent shift is visible, but when it is far enough, the shift is not significant or absent, if the distance would be infinity. So, the answer " parallax would be most effective in measuring distances to stars which are close to the Earth" seems to be the right choice.

Answer 7

Same logic for the last question, so the appropriate answer seems to be "The parallaxes beyond a few thousand light years are too small to be measured with common instruments."