Question

The diagram below shows the position of the sun and two galaxies, G1 and G2.

What is the distance between the galaxies, G1 and G2?

33 AU

46 AU

3333 AU

4666 AU

Answer 1

anyone can help me calculate this, i know there is a formula but i cant find it in my notes anywhere :(

Answer 2

@bohotness @amistre195

Answer 3

@amistre64

Answer 4

@ganeshie8

Answer 5

@mathstudent55

Answer 6

@iGreen @dan815

Answer 7

@tkhunny @iambatman

Answer 8

@sammixboo

Answer 9

It would help if you would stop tagging people and provide the diagram along with your best efforts.

Answer 10

ok, sorry, its just that no one is in the physics chat either

Answer 11

Don't forget the "your best efforts" part.

Answer 12

Okay, how do AUs work? Are they linear, logarithmic, or something else?

Answer 13

i think its just a formula on converting km to au...i think

Answer 14

@tkhunny

Answer 15

AU is an abreviation for astronomical unit

Answer 16

@AravindG

Answer 17

im not sure if the answer is c or not

Answer 18

i know what it is in km but i need to convert it to au
700 billion km - 200 billion km = 5 billion km

5 billion km is the distance between galaxy 1 and galaxy 2

Answer 19

500 billion km *

Answer 20

Okay, now decide what we are dealing with.

two hundred 200 km

two hundred thousand 200,000 km

two hundred million 200,000,000 km

two hundred billion 200,000,000,000 km = 1,337 AU

That's just a simple conversion.

2.000000000 * 10^(11) km * 6.68458712 × 10^(-9) (AU/km) = 2*6.68458712 * 10^2 AU = 1337 AU

That might be a little cleaner.

Now what? I measure on my screen, 2.625" from Sol to G1 and 4.5" from G1 to G2. Shall we just scale it in a linear fashion? 4.5 / 2.625 = 1.714285. That doesn't get us all the way up to 3333.

Maybe we overlooked rounding considerations? 200 billion isn't necessarily more than one (1) significant figure.

Answer 21

ohhh 200 billion has 9 zeros? i put 12 lol

Answer 22

but 700 billion is the entire distance of the SUN to GALAXY 2
and 200 billion is the distance of SUN to GALAXY 1
so in AU , 200 billion km is = 1,337 AU
so, do you think if we find the AU of 700 billion km we can subtract 1,337 AU from it?

Answer 23

4,679 AU = 700 billion km is what i got from using google as a converter

Answer 24

i just subtracted 1,337 from 4,679

4,679 - 1,337 = 3,342

Answer 25

is this right? @tkhunny

Answer 26

4679 AU = 700 bkm Thus 1337 AU = 200 bkm -- Okay, I'm liking that, but how do we know it's 700 bkm? I didn't see that in the problem statement.

Sol ==> G1 200 bkm ==> 1337 AU
G1 ==> G2 1,337 AU * 1.714285 = 2,292 AU
Sol ==> G2 1,337 AU + 2,292 AU = 3,629 AU

Okay, I'm feeling a LITTLE better about 3,333 AU

Answer 27

its 700 billion km because it is at the top of the diagram, i dint see it at first either lol

Answer 28

i accidentally cut that off :(

Answer 29

heres the whole diagram

Answer 30

the closest answer is 3,333 AU right?

Answer 31

@tkhunny

Answer 32

Fair enough.

Answer 33

alrighty, thanks a million. this question was driving me crazy haha