Answer: Determine the magnitude of force at the pin A and

Conceptual Physics 12
Problem 9E If Earth were smaller than it is, but the Alexandria-to-Syene distance were the same, would the shadow of the vertical pillar in Alexandria be longer or shorter at noon during the summer solstice?

Introductory Chemistry 5
What is the oxidation state of Cl in each ion? (a) \(\mathrm{ClO^-}\) (b) \(\mathrm{ClO_2^{~-}}\) (c) \(\mathrm{ClO_3^{~-}}\) (d) \(\mathrm{ClO_4^{~-}}\) Equation Transcription:

Introductory Chemistry 5
Determine the number of moles of \(\mathrm{H}\) in each sample. (a) \(4.67 \mathrm{~mol} \mathrm{H}_{2} \mathrm{O}\) (b) \(8.39 \mathrm{~mol} \mathrm{NH}_{3}\) (c) \(0.117 \mathrm{~mol} \mathrm{~N}_{2} \mathrm{H}_{4}\) (d) \(35.8 \operatorname{mol} \mathrm{C}_{10} \mathrm{H}_{22}\)

Introductory Chemistry 5
Write a balanced chemical equation for the reaction of gaseous nitrogen dioxide with hydrogen gas to form gaseous ammonia and liquid water.

An Introduction to Thermal Physics 1
Problem 25P The mathematics of the previous problem can also be applied to a one-dimensional random walk: a journey consisting of N steps, all the same size, each chosen randomly to be either forward or backward. (The usual mental image is that of a drunk stumbling along an alley.) a) Where are you m

Chemistry 11
Why is the lattice energy of a solid always a positive quantity? Why is the hydration of ions always a negative quantity?

Psychology 5
The unconscious is at work when subliminal and unconscious processes influence thought and behavior. a. minimal b. repressive c. dynamic d. cognitive

Biology for AP Courses
How many different offspring genotypes are expected in a trihybrid cross between parents heterozygous for all three traits? How many phenotypes are expected if the traits behave in a dominant and recessive pattern? a. 64 genotypes; 16 phenotypes b. 16 genotypes; 64 phenotypes c. 8 genotypes; 27 pheno