#### Video

## 0.4 Metric Units and Dimensional Analysis (Solution, Pt. 2)

#### Lesson Summary

How many seconds are in a day?

How many hours are in a year?

How many kg are there in 7×1025 μg?

How many sec are there in 5.2 ×1018 ns?

Please convert 20 km to cm.

If you’re going 50 miles/hour, how many feet/second are you traveling?

On average, hummingbirds fly at 30 miles/hour. Convert this speed to m/s. (Note: 1 m = 3.28 feet and 1 mile = 1.61 km.)

The Brooklyn Bridge is 277 feet tall. Convert this to meters. (Note: 1 m = 3.28 feet.)

In a vacuum, light travels at a speed of 2.998 x 108 m/s. Convert this to miles per hour. (Note: 1 mile = 161 km.)

What is the mass in kilograms of 18.5 gallons of gasoline? (Note: the density of gasoline is 0.70 g/mL.)

What is the density, in g/cm3, of a 1.5 kg cube whose edges are each 5 cm?

The density of aluminum is 2.7 g/mL. What volume (in L) would a 50.2 g sample of aluminum occupy?

#### Lesson

0.4 Metric Units and Dimensional Analysis (Solution, Pt. 2)

#### Instructor

Dr. Christiansen is a chemistry professor at Utah State University and has a PhD in organic chemistry. He's been teaching students chemistry for nearly 12 years.