Posts Tagged ‘help’
science help thank yous so much?
Question by Chad Jinkins: science help thank yous so much?
1. __________ is the use of knowledge to solve practical problems.
A. Curiosity
B. Chemistry
C. Physics
D. Technology
2. __________ is a system of knowledge and the methods used to find that knowledge.
A. Chemistry
B. Astronomy
C. Technology
D. Science
4. Because there are many steps in determining scientific knowledge, science is
A. a single event.
B. a single occurrence.
C. a process.
D. none of the above
5. Scientists in which fields do NOT use the scientific method?
A. Geology
B. Chemistry
C. Physics
D. All of the above use the scientific method
6. Which step of the scientific method is information obtained through the senses?
A. drawing conclusions
B. making observations
C. analyzing data
D. revising a hypothesis
Best answer:
Answer by David D
D. Technology
D. Science
C. a process.
D. All of the above use the scientific method
B. making observations
Know better? Leave your own answer in the comments!
Telescope purchase help: for night view, Alabama, new to astronomy, search software, 6-8 hundred price range?
Question by Scott D: Telescope purchase help: for night view, Alabama, new to astronomy, search software, 6-8 hundred price range?
My 10 year old twins are enthralled with the night sky. We live at a decent viewing location in south Alabama and I want them to reach for the stars. I feel like I am reading Greek when comparing scopes. If you have a suggestion for a specific brand and model in the $ 6-8 hundred price range I would appreciate it. I don’t mind paying more as long as the quality is good.
Best answer:
Answer by Harvey Manfredjensenden
If you don’t mind manually finding objects, get this: http://www.telescope.com/control/product/~category_id=dobsonians/~pcategory=telescopes/~product_id=09709
Or this one will help you find things by telling you where to aim but you’ll still have to manually move the scope: http://www.telescope.com/control/product/~category_id=dobsonians/~pcategory=telescopes/~product_id=27184
Or this one is completely automatic, all you have to do is to find two or three bright stars to calibrate it: http://www.telescope.com/control/product/~category_id=cassegrains/~pcategory=telescopes/~product_id=09944
As you can tell you can either get a big scope that is manually operated or spend the same amount and get a smaller one that will find the objects for you.
What do you think? Answer below!
Q&A: Help with the astronomy software Celestia?
Question by Cyber: Help with the astronomy software Celestia?
I cannot navigate to certain objects. How do I go to the star Betelguese or the Andromeda Galaxy?
Best answer:
Answer by tetroxide
http://earth.google.com/
Know better? Leave your own answer in the comments!
Astronomy help!!!!!!?
Question by Harrison: Astronomy help!!!!!!?
In the composite Bullet Cluster image, notice that the hot, X-ray-emitting gas (red) is not in the same place as most of the visible galaxies and most of the matter (blue). How do we think the hot gas came to be in a different place from the galaxies and most of the matter?
A)The Bullet cluster is actually two separate galaxy clusters that have collided, stripping out hot gas in the process.
B)The hot gas is the product of galactic winds from many supernovae occurring within the cluster’s galaxies.
C)The hot gas was left behind from the larger protogalactic cloud that gave birth to this cluster.
D)The hot gas actually is in the same place as the galaxies, but gravitational lensing makes it appear to be in a different place.
Careful measurements show that the hot, X-ray-emitting gas in the Bullet Cluster contains about 7 times as much total mass as all the stars in the cluster’s galaxies combined. Therefore, the fact that the most of the gravity is in the blue regions that surrounds the visible galaxies, rather than in the regions with the hot gas, indicates that __________.
A) there is even more matter surrounding the galaxies than there is in the hot gas
B) the hot gas is actually dark matter
C) the hot gas must contain 7 times as much matter as the blue regions
D) the visible galaxies are made entirely of dark matter
Feel free to answer one question or both!!!!!
Best answer:
Answer by c
a a
Know better? Leave your own answer in the comments!
No CommentsHelp with Astronomy homework please!?
Question by Lacey T: Help with Astronomy homework please!?
This is for my Intro to Astro class. I’ve searched through my book and googled beyond belief, if anyone could help me with the process of solving this problem. Thank you so much!
There is also an image for the problem though I’m not sure about the relevancy
http://dl.dropbox.com/u/2868199/homework1.jpg
Problem:
a. Count the number of steps in Powers of 10 between when the orbits of the
giant planets fill the screen, and when the first nearby star (Arcturus) appears.
Each step is one power of 10. What is the approximate ratio of the size of the
solar system to the distance between the sun and Arcturus?
b. Check your answer to part a: the radius of Neptune’s orbit is 30.2 AU. The
distance from the sun to Arcturus is 11.3 pc. Exactly how many solar systems
would need to be lined up side-by-side to fill the distance to Arcturus?
Best answer:
Answer by eri
For part a, do the first part. You can find the video of Powers of Ten on youtube. Since each step is a factor of ten, if you had one step, the ratio would be 10^1 = 10, two steps is 10^2= 100, three is 10^3 = 1,000, etc. For part b, convert 11.3 pc to AU (Google can do that for you if you can’t) and then divide by 30.2 to find out how many solar systems it would take to get to Arcturus.
What do you think? Answer below!