Michael Phelps swam the 100 meter butterfly in 50
seconds. What was his
average speed in meters
per second?

Significant figures are digits read directly from the measuring instrument plus one more digit, which is __ by the observer.

One does not belong why? ice, gold ,wood ,diamond and table salt

Scientists often have to deal with numbers that are either very large or very small. for example, the radius of the sun is approximately 696,000 kilometers, while bacterial cells are as small as 1.9 × 10-4 millimeters. express each number in an alternate form.