Physics Quiz #1

Calculate the following, and express the answer in scientific notation with the correct number of significant figures: (0.82 x 0.042)(4.4 x 10³)

• 3.78 x 103

• 3784

• 3.784 x 10³

• 3.8 x 10³

Based on the data from Table 1, which of the following statements is correct?

• As time increased, the temperature increased for both substances.

• There is no relationship between heating time and temperature for either substance.

• The temperature increased equally during each time period for both substances.

• None of the above

The SI base unit for time is

• 1 hour

• 1 day

• 1 minute

• 1 second

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

• precise

• accurate

• both accurate and precise

• neither accurate nor precise

In the steps of the scientific method, what is the next step after formulating and objectively testing hypotheses?

• making observations and collecting data

• stating conclusions

• interpreting results

• conducting experiments

Measuring temperature would most likely involve which major area in physics?

• thermodynamics

• relativity

• optics

• vibrations and wave phenomena

The average mass of a proton is 1.673 x 10^–27 kg. What is this mass in grams?

• 1.673 x 10^–30 g

• 1.673 x 10^–81 g

• 1.673 x 10^–27 g

• 1.673 x 10^–24 g

After making observations and collecting data that leads to a question, a physicist will then

• interpret the results

• formulate and test hypotheses by experimentation

• revise the initial hypotheses

• state conclusions

Models can do all of the following except

• explain every aspect of natural phenomena

• help build hypotheses

• guide experimental design

• make predictions in new situations

How many significant figures does 50.00300 have?

• five

• seven

• two

• three