CBA 1.2 Measurements in Physics Experiments

The symbol mm represents

• micrometer

• millimeter

• megameter

• nanometer

The symbols for units of length in order from smallest to largest are

• m, cm, mm ,km

• mm, m, cm, km

• km, mm, cm, m

• mm, cm, m, km

The SI unit used to measure length is

• meter

• mile

• inch

• all are SI units of length

The SI base unit for time is the second and it is also the base unit in the English System

• True

• False

What would be the most appropriate SI unit for measuring length of an automobile?

• centimeter

• kilometer

• meter

• millimeter

If some measurements agree closely with each other but differ widely from the actual value these measurements are

• neither precise nor accurate

• accurate but not precise

• acceptable as a new standard of accuracy

• precise but not accurate

These values were obtained as the mass of a bar of metal: 8.83g, 8.84g, 8.82g but the known mas is 10.68 g. These values are

• accurate

• precise

• both accurate and precise

• neither accurate nor precise

Five darts strike near the center of the target. The dart thrower is

• accurate

• precise

• both accurate and precise

• neither accurate nor precise

In a game of horseshoes, one horseshoe lands on the post. Four horseshoes land nowhere near the post. The one horseshoe on the post was thrown

• Accurately

• precisely

• both accurately and precisely

• neither accurately nor precisely

Calculate the following and express the answer to the correct number of significant figures 21.4 + 15 + 17.1 + 4.003

• 57.573

• 57.57

• 57.6

• 58