The Harvard College Observatory Computers from c. 1880 into the early 20th century were:
A) the first digital computers.
B) not much different than cash registers.
C) functionally similar to the modern 4- function calculator.
D) a group of women who made important contributions to astronomy.
E) mechanically operated adding machines.
Question 2
Typical stellar spectra appear as:
A) a series of bright, colored lines.
B) an unbroken rainbow of colors.
C) a rainbow, but with some dark lines mixed in.
D) a rainbow with some bright lines on top of the continuum.
E) a very redshifted rainbow due to the expansion of the universe.
(a) The Dmanisi cranium (right) shows similarities to early African H. erectus including the Narioko
Sharecropping, 1880
Sample Diet for a College-Aged Female Weighing 132 Pounds, Assuming Light to Moderate Daily ...
The effect of a few days of early monocular deprivation on the structure of axons projecting from ...
Supernova Remnant Captured by Chandra X-Ray Observatory
Teens who date in early adoles-cence are more likely to become sexually active