Distance divided by time

What is the difference between 103.5 and 102.24 written with the correct number of significant figures?

A) 1 B) 1.3 C) 1.26 D) 1.260 E) 1.2600

If I have a circuit which has unwanted current variations (with time) and I want to "smooth them out" (want a more steady current), which one of these should be added in series?

A) battery B) capacitor C) inductor D) resistance

Sgr A* emits radio waves

a. True b. False Indicate whether the statement is true or false

The average salinity of ocean water is

A) 96.5 parts per thousand. B) 16 parts per thousand. C) 35 parts per thousand. D) 3.5 parts per thousand.