Why is it restful to your eyes to gaze off into the

Introductory Chemistry 5
Write balanced complete ionic and net ionic equations for each reaction. (a) \(\mathrm{HI}(a q)+\mathrm{KOH}(a q) \rightarrow \mathrm{H}_{2} \mathrm{O}(\mathrm{l})+\mathrm{KI}(a q)\) (b) \(\mathrm{Na}_{2} \mathrm{SO}_{4}(a q)+\mathrm{CaI}_{2}(a q) \rightarrow \mathrm{CaSO}_{4}(s)+2 \mathrm{Na

Classical Mechanics 0
A particle moves in a circle (center O and radius R) with constant angular velocity \(\omega\) counter-clockwise. The circle lies in the xy plane and the particle is on the x axis at time t = 0. Show that the particle's position is given by \(\mathrm{r}(t)=\hat{\mathrm{x}} R

Physics: Principles with Applications 6
Problem 51P (a) Compare the shift in frequency if a 2000-Hz source is moving toward you at 15 m/s, versus you moving toward it at 15 m/s. Are the two frequencies exactly the same? Are they close? (b) Repeat the calculation for 150 m/s and then again (c) for 300 m/s. What can you conclude about the

OpenIntro Statistics 3
A migraine is a particularly painful type of headache, which patients sometimes wish to treat with acupuncture. To determine whether acupuncture relieves migraine pain, researchers conducted a randomized controlled study where 89 females diagnosed with migraine headaches were randomly assigned to one

OpenIntro Statistics 3
Family size. Suppose we want to estimate household size, where a household is defined as people living together in the same dwelling, and sharing living accommodations. If we select students at random at an elementary school and ask them what their family size is, will this be a good measure of house

Chemistry 9
Name each binary compound. a. CsF b. AlCl3 c. LiH

Principles of Economics 6
The price of cheese rises from $6 to $10 per pound, while the price of wine remains $3 per glass. For a consumer with a constant income of $3,000, show what happens to consumption of wine and cheese. Decompose the change into income and substitution effects.

Chemistry for today : general, organic, and biochemistry 9
Classify the following processes according to their rates as very slow, slow, or fast: a. The souring of milk stored in a refrigerator b. The cooking of an egg in boiling water c. The rusting of a shovel left in the garden over the winter d. The growing of corn during a warm summer e. The burning of