The energy of a sound wave is proportional to its amplitude squared. Why is it difficult to hear poolside sounds when swimming underwater?

. When heated to $700-800^{\circ} \mathrm{C}$, diamonds, which are pure carbon, are oxidized by atmospheric oxygen. (They burn!) Write the balanced equation for this reaction.

Write the structures of the kinetic and thermodynamic enolates formed in the alkylation of 2-methylcyclohexanone.

Compare a 5.0 m solution of ethylene glycol, $HOCH_2CH_2OH$, to pure water.
(a) What is the difference in freezing points?
(b) What is the freezing point of a 5.0 m ethylene glycol solution?

Classify the following as mixtures or pure substances. a. a multivitamin tablet b. the blue liquid in your car's windshield reservoir c. a ham and cheese omelet d. a diamond

A quadrupole mass spectrometer can be purchased today for $85,000. The owner of a mineral analysis laboratory expects the cost to increase exactly by the specialty laboratory equipment cost index over the next 10 years. (a) If the specialty equipment inflation rate is estimated to be 2% per year for the next 3 years and 5% per year thereafter, how much will the spectrometer cost in 10 years? (b) If the applicable cost index is 1203 now, what will the index be 10 years from now at the expected inflation rates?

The measure of a star's brightness is called its a. parallax. b. color index. c. visual binary. d . magnitude.

A board foot is a unit for measuring wood. One board foot has a volume of 144 cubic inches. The Doyle log rule, given by expression $b=l\left(\frac{r-2}{2}\right)^2$, is a formula for approximating the number b of board feet in a main trunk of a Douglas fir that can be modeled by expression $V=250 r^3$ where r is the radius of the trunk at the base of the tree. Suppose you need 5000 board feet from a 20-foot Douglas fir log. What volume of wood do you need?

A board foot is a unit for measuring wood. One board foot has a volume of 144 cubic inches. The Doyle log rule, given by expression $b=l\left(\frac{r-2}{2}\right)^2$, is a formula for approximating the number b of board feet in a main trunk of a Douglas fir that can be modeled by expression $V=250 r^3$ where r is the radius of the trunk at the base of the tree. Suppose you need 5000 board feet from a 20-foot Douglas fir log. What is the radius of a log that will meet your needs?

Create the Rectangle class from this chapter. Add a function to overload the gt (greater than] operator. Instantiate at least two objects and make sure that your function works.

Why is it difficult to reduce the national debt?

Why does using steroids for increasing muscle strength often result in injury?

Which refractive index would indicate the densest material? a) 1.2 b) 1.3 c) 1.4 d) 1.5

Draw structures for the following alcohol, amine, and ether molecules. isopropyl ether