An X-ray photon has 38.0 keV of energy before it scatters

Introductory Chemistry 5
Evaporating sweat cools the body because evaporation is endothermic and absorbs 2.44 kJ per gram of water evaporated. Estimate the mass of water that must evaporate from the skin to cool a body by \(0.50\ ^{\circ}\mathrm{C}\), if the mass of the body is 95 kg and its heat capacity is \(4.0\mathrm{\ J

Mathematical Statistics with Applications 7
Let \(p(y)\) denote the probability function associated with a Poisson random variable with mean \(\lambda\) a. Show that the ratio of successive probabilities satisfies \(\frac{p(y)}{p(y-1)}=\frac{\lambda}{y}\), for \(y=1\), 2,.... b. For which values of is \(p(y)>p(y-1)\)? c. Notice that the resul

Microbiology: An Introduction 11
Which of the following is not a functionally analogous pair of stains? a. nigrosin and malachite green b. crystal violet and carbolfuchsin c. safranin and methylene blue d. ethanol-acetone and acid-alcohol e. none of the above

Chemistry 11
How many seconds are there in a solar year (365.24 days)?

Chemistry 11
An iron bar weighed 664 g. After the bar had been standing in moist air for a month, exactly one-eighth of the iron turned to rust \(\left(\mathrm{Fe}_{2} \mathrm{O}_{3}\right)\). Calculate the final mass of the iron bar and rust.

Chemistry 11
A 0.054 M \(\mathrm{HNO_2}\) solution is titrated with a KOH solution. What is \([\mathrm H^+]\) at half way to the equivalence point?

Human Anatomy & Physiology 9
The velocity of nerve impulse conduction is greatest in (a) heavily myelinated, large-diameter fibers, (b) myelinated, small-diameter fibers, (c) nonmyelinated, small-diameter fibers, (d) nonmyelinated, large-diameter fibers.

Psychology 5
The apparently altruistic behavior of non-human animals can often be explained by a. kin selection. b. obedience. c. informational influence. d. cognitive dissonance.