Science Questions (2 Viewers)

[ratcher0071]

The 4th module for Physics is The Cosmic Engine

Is there any websites that will provide information about this module?

 

[Dr. Zoidberg]

Re: Information on Cosmic Engine

caresa.com.au

 

[ratcher0071]

Chemistry-Water Module

Is there any really good sites that will provide information about the water module in chemistry?

 

[-tal-]

Re: Chemistry-Water Module

No. The kind of info you're looking for is in a textbook. And not the excel one either.

 

[Aerath]

Re: Chemistry-Water Module

Conquering Chemistry, Jacaranda Chemistry, Spotlight Chemistry, Chemistry in Contexts, Surfing Chemistry - any of those are pretty good from what I hear.
And also - this - http://science.uniserve.edu.au/school/curric/stage6/chem/water.html

 

[ratcher0071]

Questions

1) In which way does the moon orbit the Earth? (circular,etc...)
2) Does the moon's orbit cause any problems to the Earth? (waves, etc...)
3) Does the Earth's mass affect the moon? or vice versa?

thanks for the help!

 

[bored of sc]

Re: Chemistry-Water Module

http://boredofstudies.org/view.php?course=11

Scroll down to the general section and find preliminary revision documents/water module notes.

 

[ratcher0071]

Distance, mass and gravity formula(e)?

What is the relationship between distance, mass and gravitational field?

What are the different formulas (1 or more that incorporate) that have:
-distance
-mass
-gravitational field

 

[Aerath]

Re: Distance, mass and gravity formula(e)?

g = Gm/r²

 

[ratcher0071]

mass, radius and velocity formula(e)?

What formulae are there that have
-mass
-radius
-velocity

Thanks for the help!

 

[bored of sc]

Re: Moon orbit around Earth

http://www.windows.ucar.edu/tour/link=/the_universe/uts/moon1.html

1. Virtually circular.

2. The moon's gravitational pull when it is closest to the Earth causes king tides (in conjunction with storm surges etc). This can destroy infrastructure/housing/buildings.

3. The Earth's mass is larger than the moon's. Therefore the moon orbits the Earth. The moon is held in a circular orbit by the Earth's gravitational forces. Force (gravity) = mass (of Earth/moon) x acceleration (speed at which Earth/moon are travelling through space).


The physics kids will soon clear up any doubts you may have.

 

[ratcher0071]

Re: Distance, mass and gravity formula(e)?

g = Gm/r²

What does the G and g represent?

 

[bored of sc]

Re: mass, radius and velocity formula(e)?

force = mass.acceleration
acceleration = (final velocity - intial velocity) / time
area of circle = pi.radius²
volume of sphere = 4/3.pi.radius³
surface area sphere = 4.pi.radius²

circular motion:
acceleration of object = tangential velocity² / radius of circle
centripetal force = mass.acceleration = mass.(velocity²/radius)
http://tutor4physics.com/motioncircular.htm

 

[tommykins]

Re: Distance, mass and gravity formula(e)?

What does the G and g represent?

g = f = gravity.

G = 6.67*10^-11 univeral gravitational constant.

 

[bored of sc]

Re: Distance, mass and gravity formula(e)?

http://en.wikipedia.org/wiki/Newton's_law_of_universal_gravitation

 

[Aplus]

Re: Moon orbit around Earth

Orbits are elliptical.

 

[ratcher0071]

Gravitational Field

1) What is gravitational field?
2) What is the gravitational field of the Earth?

 

[bored of sc]

Re: Gravitational Field

http://en.wikipedia.org/wiki/Gravitational_field

Mate, I think you should type of these queries into google. That's all I've been doing everytime you've posted something up.

 

[ratcher0071]

centripedal force

does:
F= mv^2 / r

If yes, can you derive it?

 

[bored of sc]

Re: centripedal force

Yeah, it does.

A = v²/r
Acceleration of circular movement of object = tangential velocity²/radius of circular object

F = ma
Force = mass.acceleration --> explained through Newton's 2nd Law of Motion I believe.

Since A = v²/r sub v²/r as a into f = ma
Therefore, F = m/1.(v²/r)
Multiply numerators and denominators seperately.
F = mv²/r