Physics - The Science of Physics - B

A hiker uses a compass to navigate through the woods, Identify the area of physics that this involves.

• thermodynamics

• relativity

• electromagnetism

• quantum mechanics

According to the scientific method, how does a physicist formulate and objectively test hypotheses?

• by defending an opinion

• by interpreting graphs

• by experiments

• by stating conclusions

Diagrams are not designed to

• show relationships between concepts

• show setups of experiments

• measure an event or a situation

• label parts of a model

The most appropriate SI unit for measuring the length of an automobile is the

• micron

• kilometer

• meter

• nanometer

The radius of the Earth is 6,370,00 m. Express this measurement in km in scientific notation with the correct number of significant digits.

• 6.37 x 10⁶ km

• 6.37 x 10³ km

• 637 x 10³ km

• 63.7 x 10⁴ km

Three values were obtained for the mass of a metal bar: 8.83 g, 8.84 g, 8.82 g. The known mass is 10.68 g. The values are

• accurate

• precise

• both accurate and precise

• neither accurate nor precise

Calculate the following, and express the answer in scientific notation with the correct number of significant figures:

10.5 x 8.8 x 3.14

• 2.9 x 10²

• 290.136

• 2.90 x 10²

• 290

Which of the following equations best describes the graph above?

• y = 2x

• y = x

• y = x²

• y = 1/2 x

Calculate the following, and express the answer in scientific notation with the correct number of significant figures:

(0.82 + 0.042)(4.4 x 10³)

• 3.8 x 10³

• 3.78 x 10³

• 3.784 x 10³

• 3784

Which of the following equations best describes the graph above?

• y = x² +1

• y = x² -1

• y = -x² +1

• y = -x² -1