Assume a balloon material with a constant surface tension

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?

Biology 8
The functioning of enhancers is an example of a. transcriptional control of gene expression. b. a post-transcriptional mechanism for editing mRNA. c. the stimulation oftranslation by initiation factors. d, post-translational control that activates certain proteins, e. a eukaryotic equivalent of proka

Chemistry: An Introduction to General, Organic, and Biological Chemistry 12
Strontium has four naturally occurring isotopes, with mass numbers 84, 86, 87, and 88. a. Write the atomic symbol for each of these atoms. b. How are these isotopes alike? c. How are they different? d. Why is the atomic mass of strontium listed on the periodic table not a whole number? e. Which isoto

Human Anatomy & Physiology 9
Match the names of the cranial nerves in column B to the appropriate description in column A. Column A ____ (1) causes pupillary constriction ____ (2) the major sensory nerve of the face ____ (3) serves the sternocleidomastoid and trapezius muscles ____ (4) purely sensory (two nerves) ____ (5) serves

Krugman's Economics for AP* 2
Long-run economic growth depends almost entirely on a. technological change. b. rising productivity. c. increased labor force participation. d. rising real GDP per capita. e. population growth.

Concepts of Biology 1
What is the main difference between dispersal and vicariance? a. One leads to allopatric speciation, whereas the other leads to sympatric speciation. b. One involves the movement of the organism, whereas the other involves a change in the environment. c. One depends on a genetic mutation occurring, w

Plant Systematics 3
What is reticulation? How might it be detected?

Principles of Economics 9
Suppose Americans decide to save more of their incomes. If banks lend this extra saving to businesses, which use the funds to build new factories, how might this lead to faster growth in productivity? Who do you suppose benefits from the higher productivity? Is society getting a free lunch?