The ________ is the spherical outer portion of the Galaxy, including the orbits of the globular clusters and most dark matter
Fill in the blank(s) with correct word
halo
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The helium core flash occurs in very high mass stars
a. True b. False Indicate whether the statement is true or false
The image below shows a rock formation nicknamed “the face on Mars” that was taken by the Viking 1 orbiter in 1976. Given the clear resemblance to a face, what is an appropriate scientific reaction to this image?
A) Assume it is most likely a coincidental result of light and shadow, and plan higher resolution follow-up observations.
B) Assume that the image is probably evidence of an advanced civilization, and develop plans to attempt radio communication wit the civilization.
C) Conclude that the resemblance to a human face is so clear that it cannot have been made by nature and that this geological feature must have been built by an advanced civilization.
D) Assume that NASA's spacecraft must have been hacked by someone perpetrating a hoax, and therefore ignore the image
A person weighing 200 pounds stands on snowshoes. If the area of each snowshoe is 400 square inches, the pressure on the snow is 0.25 psi
a. True b. False Indicate whether the statement is true or false
A string is stretched and fixed at both ends, 200 cm apart. If the density of the string is 0.015 g/cm, and its tension is 600 N, what is the wavelength (in cm) of the first harmonic?
a. 600 b. 400 c. 800 d. 1000 e. 200