One target of the UN Millennium Development Goals that has successfully been reached involved cutting in half the number of people who lack access to
a. public education.
b. information technology.
c. international trade.
d. safe drinking water.
Ans: d. safe drinking water.
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What class of metals provides candidates with the lowest price per unit volume and a yield strength of over 1000 MPa?
(a) Aluminum alloys (b) Steels (c) Titanium alloys (d) Cast iron
The news writing style that places a summary first, followed by details, then background information is called the ______ style.
A. chunked text B. inverted pyramid C. dense paragraph D. conclusion-first
Consider a pipe of length L that is open at one end and closed at the other end. What are the wavelengths of the three lowest-pitch tones produced by this pipe?
A) 4L, 2L, L B) 2L, L, L/2 C) 2L, L, 2 L/3 D) 4L, 4L/3, 4L/5
If heat death results in a maximum amount of entropy, then what does this say about entropy at the beginning of the universe?
A) Entropy at the beginning of the universe must also have been at a maximum. B) There was a change in the direction of entropy flow about 7 billion years ago. C) The Big Bang was a moment of minimal entropy. D) Nothing.