IP (a) Find the normal force exerted on a 2.9-kg book

Introductory Chemistry 5
What are the basic unitssingle atoms, molecules, or formula unitsthat compose each substance? (a) \(\mathrm{Rb}_{2} \mathrm{O}\) (b) \(\mathrm{N}_{2}\) (c) \(\mathrm{Fe}\left(\mathrm{NO}_{3}\right)_{2}\) (d) \(\mathrm{~N}_{2} \mathrm{~F}_{4}\)

Probability and Statistical Inference 9
Problem 17E If 15 observations are taken independently from a chi-square distribution with 4 degrees of freedom, find the probability that at most 3 of the 15 observations exceed 7.779.

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
Classify the following bonds as ionic, polar covalent, or covalent, and give your reasons: (a) the CC bond in \(\mathrm{H}_{3} \mathrm{CCH}_{3}\), (b) the KI bond in KI, (c) the NB bond in \(\mathrm{H}_{3} \mathrm{NBCl}_{3}\), (d) the CF bond in \(\mathrm{CF}_{4}\).

The Practice of Statistics 5
Heart weights of mammals Here are some data on the hearts of various mammals.23 Mammal Length of cavity of left ventricle (cm) Heart weight (g) Mouse 0.55 0.13 Rat 1.0 0.64 Rabbit 2.2 5.8 Dog 4.0 102 Sheep 6.5 210 Ox 12.0 2030 Horse 16.0 3900 (a) Make an appropriate scatterplot for predicting heart w

Urban Economics 8
Consider the example shown in Tables 21 and 22. Suppose a single number changes: The shirt output per hour in the North is four shirts instead of six shirts. To specialize, a North household switches one hour from bread to shirts, and a South household switches two hours from shirts to bread. The exc

Principles of Economics 9
Which of the following is an example of a public good? a. residential housing b. national defense c. restaurant meals d. fish in the ocean

Biochemistry 9
With the concerted model, what conditions favor greater cooperativity?