Physics Plz help.....?

Question

1. How many miles would a person walk in 3 h if his average pace is 15 min/mi?

2. Convert 3,500 mu.gifs to milliseconds.

Answer 1

1) 3 hours = 180 minutes.  180/15 = 12 miles

2) 1 Microsecond = 0.001 Milliseconds, so:

     3500 Microseconds = 3.5 Milliseconds

NOTE: I assumed that "mu.gif" was a copy/paste error, and that you were referring to "μs", or "Microseconds".

Answer 2

Use unit (aka dimensional) analysis:

3 hr * 1mi/0.25 hr = 12 mi

I don't know what mu.gifs means. When you figure out what you mean, here's a handy on-line conversion calculator:

http://www.onlineconversion.com/

Answer 3

1. 60 min/4 mi = 1 hr/4 mi. Therefore, 3 hrs = 12 mi

2. If you can elaborate on this one, perhaps I can help. I don't know what mu.gifs are....Is that a typo?