1. Intro to Physics Units

Astronomers often detect radio waves with wavelengths of 3,000,000,000 nm. What is this wavelength expressed in decameters (dam)?

Rewrite 0.00016 kg in scientific notation.

Rewrite 299,800,000 m/s in scientific notation.

Rewrite 3.41 × 10⁻⁴ in standard form:

Rewrite 9.98 × 10⁷  in standard form.

The position of an object is given by 𝓍 = At + Bt², where 𝓍 is in meters and t is in seconds. What are the units of A and B?

Write the following numbers in powers of 10 notation: 0.219.

Write out the following numbers in full with the correct number of zeros: 2.5 x 10⁻¹

Time intervals measured with a physical stopwatch typically have an uncertainty of about 0.2 s, due to human reaction time at the start and stop moments. What is the percent uncertainty of a hand-timed measurement of 4.5 min?

A watch manufacturer claims that its watches gain or lose no more than 9 seconds in a year. How accurate are these watches, expressed as a percentage?

Write the following as full (decimal) numbers without prefixes on the units: 22.5 nm.

Express the following using the prefixes of Table 1–4: 18 x 10² bucks.

A demented scientist creates a new temperature scale, the 'Z scale.' He decides to call the boiling point of nitrogen 0°Z and the melting point of iron 1000°Z. Convert 500°Z to degrees Celsius and to kelvins.

The lowest and highest natural temperatures ever recorded on earth are −129°F in Antarctica and 134°F in Death Valley. What are these temperatures in °C and in K?