### Use Your Knowledge of English:

If the sun is 93,000,000 miles from the Earth, how many minutes does it take for sunlight to reach the Earth?
(Given: The velocity of light is 186,000 miles per second.)

_???__minutes = 93,000,000 miles

1. From the Problem write down all the Equivalent Relationships given or Unit Factors.    For example:
• 186,000 miles = 1 second
2. Beware of our Tricks!
• We disguise numbers by making them words.
• We leave out obvious equivalent relationships, or relationships we think you should know.

• We stick extra information in the form of numbers and equivalent relationship you will not need to solve the problem

The only unit factor left out is 60 seconds = 1 minute 3. Formulate a road map which connects the unit of the given to the unit of the answer by equivalent relationships.

This takes two unit factors:

1. First convert miles to seconds using the velocity of light;
186,000 miles traveled = 1 second of elapse time.

2. The convert to total seconds for light to reach the earth from the sun
to minutes by using the unit factor: 60 seconds = 1 minute.

## The Solution:

Setup the dimensional analysis sequence and solve: