The galactic center lies in the direction of which constellation?
A) Orion
B) the Big Dipper
C) Leo
D) Sagittarius
E) Taurus
D) Sagittarius
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If a copper alloy is in the OS050 condition, it is annealed with a grain size of _________mm.
Fill in the blank(s) with the appropriate word(s).
Which statement regarding the mix of state revenues is FALSE?
a. The 50 states combined had over $1.6 trillion annual revenue in 2011.
b. Over 70 percent of all stategenerated (or "own source") revenues come from taxation.
c. Most revenue from direct charges for public services is in the form of tuition for higher education.
d. With few exceptions, states generate nearly all of their tax revenues from the general sales tax.
A radioactive substance with a half-life of 3 days has an initial activity of 0.24 Ci. What is its activity after 6 days?
A) 0.48 Ci B) 0.02 Ci C) 0.06 Ci D) 0.23 Ci E) 0.12 Ci
Which of the following statements is true?
A) In a p-type doped semiconductor the donor level is close to the valence band. B) In an n-type doped semiconductor the acceptor level is close to the valence band. C) In a p-type doped semiconductor the acceptor level is close to the valence band. D) In an n-type doped semiconductor the donor level is close to the valence band. E) None of the statements are true.