Solar System B

[49ers]

what are all the dwarf planets?

[AlphaTauri]

Pluto, Ceres, Haumea, Makemake, and Eris.

Ceres is in the Asteroid Belt; Pluto, Haumea, and Makemake are Kuiper Belt objects; Eris is in the scattered disc.

[CJAP Crazy MMM]

I am brand new to this event and just found out a couple days ago I was doing it. After going over wiki im confused on the Escape Velocity and how to find it I saw the formula but do not get it at all.
Im back (I just edited this instead of making a new one it saves room) After looking at several different websites none of this make sense and was also wondering if you could do a step by step because truthfully I am getting nowhere. . Ill probably just go study the dwarf planets in the meantime.
I cant believe im studying on the weekend danget! its growing on me!

[brobo]

First, studying on the weekend isn't an issue. NOT studying on the weekend is an issue!

Second, Escape Velocity can be a little confusing. Here goes:
Escape velocity is the velocity something must reach in order to be launched far enough away from Earth to completely escape gravitational effect yes, it is impossible to COMPLETELY escape gravitational effect, but this is far enough so that its so small that it won't get pulled back down The formula is as follows: or, in words, Escape Velocity = the square root of mass times 2 times Gravitational constant divided by radius. The mass is the mass of the planet, not the object. You would need to achieve the same velocity for a baseball, a couch, or even a building. I'm going to come back to the graviational constant in a minute. The radius is the radius of the planet. YOU MUST REMEMBER TO USE THE CORRECT UNIT OF MESUREMENT, or your results won't come out right. The mass needs to be in kilograms, but the radius needs to be in meters. On the web, you are more likely to find it in kilometers, so you need to convert.
The gravitational constant is equal to , or about .0000000000667
So if you wanted to find the escape velocity of earth, you would do:
Mass of earth: 5.9742 × 10^24 kg
Radius of earth: 6 378.1 kilometers or 6378100 meters
So you would do the following:

Notice how we put in meters for the radius, but got kilometers per second out.
So the escape velocity for earth is a little over 11 kilometers per second. This is assuming you are launching your object straight up into the air. If you are launching at any other angle you would need to do additional calculations.
Its a lot to remember, but put the formula on your notes and you'll do find. Chances are you won't find a calculator that can handle the number of digits you're looking for, but do your best.

If you need more help, PM me. I'll be happy to explain farther

[AlphaTauri]

Chances are you won't find a calculator that can handle the number of digits you're looking for, but do your best.

If you can find a calculator that uses scientific notation (like the TI-30X), you'll be fine. If not, then you might have some issues.

[CJAP Crazy MMM]

Thank you! That acually explains it better then any of the websites!

[CJAP Crazy MMM]

Quick question. Were having a practice competition at are school just us because we have 2 teams and I was making a note sheet but was confused on what might be best to put on it because of the little room we have. Big Solar System tiny paper.
maybe stuff like what it says in here?Like what parts of these things? This event will address the Sun, planets and their satellites, comets, asteroids, the Oort Cloud, the Kuiper Belt, meteoroids, meteorites, and meteors.

For this event be sure to acquire a glossary containing many astronomical terms, a list of famous astronomers and their accomplishments, a table of planetary facts (mass, volume, year length, etc.), detailed diagrams of the sun and solar features, and astronomy formulas.

[AlphaTauri]

Just put the things that you're least sure you know. For example, if you know a lot about the different planets/dwarf planets but you hardly know anything about the sun, then put info related to the sun on your notesheet. I would also put important formulas on the notesheet (and what each variable stands for), because if you mess up just one part of the equation, it can make your answer wildly inaccurate.

[CJAP Crazy MMM]

Great thanks! im on it! Also onemore question what is the Gravitational Constant because I needto know that for the Escape Velocity Formula

Just put the things that you're least sure you know. For example, if you know a lot about the different planets/dwarf planets but you hardly know anything about the sun, then put info related to the sun on your notesheet. I would also put important formulas on the notesheet (and what each variable stands for), because if you mess up just one part of the equation, it can make your answer wildly inaccurate.

[brobo]

Thats it. Its equal to about .000000000667

You could also to refer my earlier post, on this page