I am going to be a freshman in college and I intend to major in astrophysics. This past year I took AP calculus AB, and I got an A and I believe I did well on the AP test (results haven't come back yet though). This morning I took my school's math placement test, and I was placed into...
If you know the acceleration of a car and its initial velocity, you can predict which of the following?
A. The direction of the car's initial velocity
B. The magnitude of the car's final velocity
C. The displacement of the car
D. All of the above
According to this video, , if a black hole is large enough you could actually travel for some time within the event horizon without dying because the event horizon is so far from the actual singularity. So, assuming that's true, what would you see while you were inside the black hole?
What would happen if the Sun collided with an exact copy of itself? I can't find any information online about this exact scenario. So what would happen to the Sun? What would happen to the Earth and the rest of the planets?
Any information or help would be greatly appreciated. Thanks so much!
It was dry, I believe. Here are my numbers:
A. Mass of clean dry crucible 22.130
B. Mass of crucible and KClO3 23.887
C. Mass of crucible and contents after the first heating 23.441
D. Mass of crucible and contents after the second heating 23.407
E. Mass of crucible and contents after the third...
I did this lab on percentage of oxygen in potassium chlorate and I got a percent error of about 30%. I now need to find three reasons for error, and human error does not count. I think one could be that the masses used in calculating the theoretical percentage of oxygen were...
So I know that all the elements above 92 on the periodic table do not occur naturally, does that mean that we've discovered all the naturally occurring elements? Is it possible that there can be elements with a higher atomic number than 118 that we just haven't discovered yet in nature?
Hi! So I've begun the process of looking at colleges now and I really would like to go to a school in the US or Canada with an astronomy major, an observatory of its own, and some sort of planetary science program. I've made a list of the schools that I've been able to find with those things...
In a flame test lab, where different unknown substances are heated and the identity of the substance is determined by the color emitted, what can be some sources of error?
The Attempt at a Solution
I need three sources of error, and so far I have...
Will do! Here's the cloudy nights thread I started too, in case you want to keep up there http://www.cloudynights.com/topic/516660-remote-controlling-truss-dobsonian-telescope/
I'll definitely be updating this thread though too!
Is it possible to rig a Truss Dobsonian telescope like this one so that you can control it remotely from inside of a building while the telescope itself is on the roof of the building? Then is it possible to attach some sort of adapter to the telescope that would allow you to hook up a camera...
In what phase of matter do individual Neutrons/Protons/Electrons exist? They are matter aren't they? So they must exist in some phase, right? Do they change phase? I'm very curious any information would be greatly appreciated. Thanks!
I'm a junior in high school and I'm starting to look into colleges. The one that I'm most drawn to is Wesleyan University in Connecticut. I want to major in astronomy and physics, perhaps with a minor in planetary science. Wesleyan offers all of those courses, but does anyone know if they are...
I need to find three potential reasons for my .5% error in a lab where I used the Archimedes Principle to measure the density of Iron. We only used a graduated cylinder full of water and an iron mass. I measured the water level from the meniscus. We used two different...
I've heard a lot of people talk about solar sails versus things like Ion thrusters, and it seems that both have their advantages and disadvantages. So I was wondering whether or not it's possible to use both on a single spacecraft ? That way you could get the speed of an ion thruster along with...
I think it does, as long as it does so in a believable fashion.
I think that even if the technology isn't too realistic, but the implications of the technology and how people react to it could still make it hard sci fi. But that's just me.
As your hand moves back and forth to generate longitudinal pulses in a spiral spring, your hand completes 2.88 back-and-forth cycles every 6.98 s. The velocity of the pulse in the spring is 0.581 cm/s. What is the wavelength? Answer in units of m.
How would I do that? Gmm/d^2 - Gmm/d^2 = 0?
I used - because as you said if it were addition it could not add to zero, but am I setting that up right at all? Wouldn't the gravity of the two objects on the smaller one have to end up being equal to zero?
Here's my reasoning behind the x + .385...
PART 1: Objects with masses of 125 kg and 548 kg are separated by 0.385 m. A 63.5 kg mass is placed midway between them.
Find the magnitude of the net gravitational force exerted by the two larger masses on the 63.5 kg mass. The value of the universal gravitational constant...
It does seem strange, but I remember seeing an article titled "super bowl of astronomy" or something like that awhile back, and I didn't read the article but I assumed it was some sort of competition. Those are all good ideas, I could present those to my supervisor and see what he says.
That looks interesting, I'll look into it. Thanks for pointing it out! I haven't spoken to my supervisor yet, but I will first chance I get
EDIT: I meant for this to be a reply to Greg Bernhardt by the way
Couldn't we use a method like the one in this video http://www.nasa.gov/content/what-is-nasa-s-asteroid-redirect-mission/ ? Basically send a probe out there, wrap it in a bag, and bring it somewhere else? (I know Apophis is no longer a threat, but for other, future asteroids)
I run an astronomy club at my school, and I recently discovered that the robotics club gets $2000 from the school every year to build a robot. They then go on to compete in tournaments with that robot, so that justifies the $2000.
It would be great if I could get the school to give us $2000 to...
Speaking of Asimov, I just recently read Asimov on astronomy. It's great. Some of the info is a bit dated, and it's not exactly sci fi, but I'd say it counts because it's astronomy with a sci fi bend towards. Great read, highly recommended
Oh thank you so much! I just realized what I had to do divide the downward force (656.6N) by the vertical component times 2! Thank you so much for your help it is greatly appreciated. Just out of curiosity, did you know exactly how to do this problem the instant you saw it, or did you have to...
oh of course I can't believe I missed that. So the length of the normal is the square root of 14/81. Now I'd take that and divide it by (5/18) to get 1.496662955, which is the sine. And I have cosθ=5/9 and sinθ=1.496662955. How can I use this information to find the tension in the string?
I got two right triangles
each right triangle has a hyoptenuse of 1/2L and one leg is 5/18L
I said cosθ =(5/18) / (1/2) = (5/9)
so cosθ = 5/9L, then I said cos^-1(5/9) = 56.251, meaning θ = 56.251
Did I do that right?