Use the law of reflection to prove that the focal length

An Introduction to Thermal Physics 1
Problem 35P According to the Sackur-Tetrode equation, the entropy of a monatomic ideal gas can become negative when its temperature (and hence its energy) is sufficiently low. Of course this is absurd, so the Sackur-Tetrode equation must be invalid at very low temperatures. Suppose you start with a s

Principles of General Chemistry 2
Problem 15P A compound of iodine and cesium contains 63.94 g of metal and 61.06 g of nonmetal. How many grams of cesium are in 38.77 g of compound? How many grams of iodine?

Sears and Zemansky's University Physics with Modern Physics 13
Problem 50E The Cosmo Clock 21 Ferris wheel in Yokohama, Japan, has a diameter of 100 m. Its name comes from its 60 arms, each of which can function as a second hand (so that it makes one revolution every 60.0 s). (a) Find the speed of the passengers when the Ferris wheel is rotating at this rate.

Chemistry 11
The fertilizer ammonium sulfate \(\left[\left(\mathrm{NH}_{4}\right)_{2} \mathrm{SO}_{4}\right]\) is prepared by the reaction between ammonia \(\left(\mathrm{NH}_{3}\right)\) and sulfuric acid: \(2 \mathrm{NH}_{3}(g)+\mathrm{H}_{2} \mathrm{SO}_{4}(a q) \longrightarrow\left(\mathrm{NH}_{4}\rig

Quantitative Chemical Analysis 8
(a) When a solution containing 234 mg of butanol (FM 74.12) and 312 mg of hexanol (FM 102.17) in 10.0 mL was separated by gas chromatography, the relative peak areas were butanol:hexanol 1.00:1.45. Considering butanol to be the internal standard, find the response factor for hexanol. (b) Use Equation

Foundations of Sport and Exercise Psychology 7
Discuss three strategies for on-site reductions in anxiety and tension.

Chemistry 13
Because fluorine has seven valence electrons (\(2s^2 2p^5\)), seven covalent bonds in principle could form around the atom. Such a compound might be \(FH_7\) or \(FCl_7\). These compounds have never been prepared. Why?

Chemistry 13
A student is given samples of three elements, X, Y, and Z, which could be an alkali metal, a member of Group 4A, and a member of Group 5A. She makes the following observations: Element X has a metallic luster and conducts electricity. It reacts slowly with hydrochloric acid to produce hydrogen gas. E