Standard form..

Erm, any help with finding out what the answer is? I would upload the picture of the question and my working out but I can't seem to be able to attach the picture.

So anyways the question is -

The speed of light is approximately 3*10^8. Show the time taken for light from the Sun to reach the various planets. There was a few other planets which I was able to find the time for the light travel. However, the last two planets seem to be confusing me maybe b/c it's involving recurring numbers..?

So to find time you need to divide distance by speed. Pluto's distance from the sun is 5.60*10^12.

I ended up getting 5 hours 27 minutes but have no clue on how to get the seconds. The book shows the answer is 5 hours 27 minutes and 47 seconds. I can't seem to understand how they managed to get 47 seconds. If someone could explain that would be great

Sorry for the long post..

Is this bit correct?

Is this bit correct?


Apparently not

59000/3/60/60 = 5 . blah

5 hours
subtract the 5 and multiply by 60

27. blah

27 minutes
subtract the 27 and multiply by 60

giving 47 seconds

I thought my integration sticky was all we would need to deal with mangled spellings. Along came "stnadord" ...

Thank you..

I was just wandering could you not do this -

(5.90*10^12) / (3*10^8)

(5.90/3) / (10^12/10^10)

1.96 * 10^4 = 19666

19666/60.

I did this method for the other planets to find the time and it seemed to work.

you have ignored all of the decimal

you have ignored all of the decimal

I'm just pleased to see Pluto back as a planet again

It's an old textbook we're learning from.

If you wait long enough everything comes back into fashion.

I'm learning a lot of weird stuff from you

PRSOM.

*poke poke*

Mind helping me with this method question

(5.90*10^12) / (3*10^8)

(5.90/3) / (10^12/10^10)

And it continues on to post #9

Isn't the bold number wrong?

Erm yh.. It's meant to be 8

But it doesn't change the next steps in my working out..

You have the right answer. I'm not sure what you are asking?

http://image.gsfc.nasa.gov/poetry/venus/q89.html

I'm so sorry to bug you again..

But if I continued on from..

1.96* 10^4= 19600

19600/60 = 326.66666

I would then find out that 60 goes in to 326, 5 times thus giving me 5 hours. It then leaves 26.6666 remaining which is where I get 27 minutes from.

I was just wondering is this method okay to work it out? I find it baffling that it worked for all the other questions but does not seem to work for this.