What is a propeller twist?

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 kinds of intermolecular forces are present in each substance? (a) \(\mathrm{NCl}_{3}\) (trigonal pyramidal) (b) \(\mathrm{NH}_{3}\) (trigonal pyramidal) (c) \(\mathrm{SiH}_{4}\) (tetrahedral) (d) \(\mathrm{CCl}_{4}\) (tetrahedral)

Thermodynamics: An Engineering Approach 8
Saturated liquid-vapor mixture of water, called wet steam, in a steam line at \(1500 \mathrm{kPa}\) is throttled to \(50 \mathrm{kPa}\) and \(100^{\circ} \mathrm{C}\). What is the quality in the steam line? Equation Transcription:

Physics for Scientists & Engineers with Modern Physics 4
A physical pendulum consists of an 85-cm-long, 240-g-mass, uniform wooden rod hung from a nail near one end (Fig. 14-38). The motion is damped because of friction in the pivot; the damping force is approximately t proportional to d6/dt. The rod is set in oscillation by displacing it 15 from its equil

Elementary Statistics: A Step by Step Approach 8th ed. 8
Computer Ownership At a local university 54.3% of incoming first-year students have computers. If 3 students are selected at random, find the following probabilities. a. None have computers. 0.0954 b. At least one has a computer. 0.9046 c. All have computers. 0.1601

Human Biology 11
List the general characteristics of epithelium, and then describe the basic types of epithelial tissues in terms of specific characteristics and functions.

Human Heredity: Principles and Issues 11
What is the function of DNA polymerase? a. It degrades DNA in cells. b. It adds RNA nucleotides to a new strand. c. It coils DNA around histones to form chromosomes. d. It adds DNA nucleotides to a replicating strand. e. None of these.

Applied Calculus 7
For each definite integral: a. Evaluate it by integration by parts. (Give answer in its exact form.) b. Verify your answer to part (a) using a graphing calculator. \(\int_{0}^{2} x^{2} e^{x} d x\)