Posted by **cathey** on Tuesday, December 20, 2011 at 9:18am.

the speed of light is1.86 times 10^5 miles per second. using a year of 365 days, how far does light travel in a year?

- scientific notation -
**drwls**, Tuesday, December 20, 2011 at 9:29am
Multiply that speed by the number of seconds in a year, which is 365x24x3600 = ____

Express the result in scientific notation, _.__x10^_

The answer will be the length of a light=year, in miles.

Compare your answer with

http://www.universetoday.com/39630/light-year-in-miles/

- scientific notation -
**Dr Russ**, Tuesday, December 20, 2011 at 10:07am
Unless you have been told otherwise I would recommend that you include the units in a conversion such as this. While it might seem pedantic here, it can help a great deal when the units are less familiar.

365 d y^-1 x 24 h d^-1 x 60 min h^-1 x 60 s min^-1 = ___ s y^-1

- scientific notation -
**Tammy**, Saturday, September 24, 2016 at 4:28pm
7.34 x 10^26 atoms of Cu is equivalent to how many moles of Cu? (Express to 3 sf)

## Answer This Question

## Related Questions

- math - the speed of light is1.86 times 10 with a power of 5 miles per second. ...
- math - the speed of light is 1.86 times 10 with the power of 5 miles per second...
- algebra - A light-year is the distance that light travels in one year. Find the ...
- Algebra - Astronomers measure large distances in light-years. One light-year is ...
- Math - Simplify the expression. (-4)^-6(-4)^-7 My answer: -4 Simplify and give ...
- scientific notation? - A) light travels at approximately 186,000 miles per ...
- CHEMISTRY! HELP! - I have a hard time getting this someone help me? Astronauts ...
- pre-algebra - A) light travels at approximately 186,000 miles per second. ...
- my pre-algebra questions - A) light travels at approximately 186,000 miles per ...
- 8th grade - A) light travels at approximately 186,000 miles per second. ...

More Related Questions