A simple compound microscope normally uses
A) a long focal length objective and a shorter focal length eyepiece.
B) a short focal length objective and a longer focal length eyepiece.
C) a short focal length objective and a shorter focal length eyepiece.
D) a very long focal length objective and a longer focal length eyepiece.
B
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The law of definite proportions states that different samples of a pure compound always contain the same elements in the same proportion by
a. mass. b. atoms. c. atomic number. d. volume.
Consider the following quantum state vector: 
Which of the following q-vectors is physically equivalent to the vector 
?
A. 
B. 
C. 
D. 
E. None of the above
Instructions: On occasion, the notation 
will be a shorthand notation for 
.
Starting from one oasis, a camel walks 25 km in a direction 30° south of west and then walks 30 km toward the north to a second oasis. What distance separates the two oases?
A. 15 km B. 48 km C. 28 km D. 53 km E. 55 km
___________ galaxies contain large clouds of gas and dust, both young and old stars, but have no obvious spiral arms or nucleus
a. Irregular b. S0 c. E7 d. Sa e. E0