Cholesterol in blood is measured in milligrams of cholesterol per deciliter of blood. If the unit of measurement were changed to grams of cholesterol per milliliter of blood, what would a cholesterol reading of $185 \mathrm{mg} / \mathrm{dL}$ translate to?

A lap in most tracks in the United States is $0.25 \mathrm{mi}$ (English lap). In most countries that use the metric system, a metric lap is $0.40 \mathrm{~km}$. A champion marathon runner covers a mile in about $5.0 \mathrm{~min}$. How many minutes will the runner take to run an English lap? A metric lap?

Wire is often sold in pound spools according to the wire gauge number. That number refers to the diameter of the wire. How many meters are in a 10-lb spool of 12-gauge aluminum wire? A 12-gauge wire has a diameter of $0.0808$ in. Aluminum has a density of $2.70 \mathrm{~g} / \mathrm{cm}^3 .\left(V=\pi r^2 \ell\right)$

A solid with an irregular shape and a mass of $11.33 \mathrm{~g}$ is added to a graduated cylinder filled with water $(d=$ $1.00 \mathrm{~g} / \mathrm{mL}$ ) to the $35.0-\mathrm{mL}$ mark. After the solid sinks to the bottom, the water level is read to be at the $42.3-\mathrm{mL}$ mark. What is the density of the solid?

A piece of silver (Ag) metal weighing 194.3 g is placed in a graduated cylinder containing 242.0 mL of water. The volume of water now reads 260.5 mL. From these data calculate the density of silver.

If a vehicle is traveling $92$ m/s, what is its velocity in miles per hour? ($0.62$ miles =$1.00$ km)

Calculate the mass of a cube of platinum of edge length $0.040 \mathrm{~mm}\left(\right.$ density $\left.=21.4 \mathrm{~g} / \mathrm{cm}^3\right)$

The distance between two atoms in a molecule is 148 pm. What is this distance in meters?

A load of asphalt weights 254 lbs. and occupies a volume of 220.0 L. What is the density of this asphalt in g/L?

The area of the 48 contiguous states is $3.02 \times 10^6 \mathrm{mi}^2$. Assume that these states are completely flat (no mountains and no valleys). What volume of water, in liters, would cover these states with a rainfall of two inches?

Aluminum is a lightweight metal (density = 2.70 g/ cm$^3$ ) used in aircraft construction, high-voltage transmission lines, beverage cans, and foils. What is its density in kg/m$^3$ ?

Mercury has a density of $13.6$ g /ml. What is the mass of $4.72$ L of mercury?

Bromine is a reddish-brown liquid. Calculate its density (in g/mL) if 586 g of the substance occupies 188 mL.

Which of the following are visible on the EEG of a person in NREM-3 sleep? a. Sleep spindles. b. REM. c. Alpha waves. d. SCN. e. Delta waves.