Which telescope did astronomers use in 1974 to send an anticoded message to globular cluster M13?
a. HST
b. Keck
c. Arecibo
d. Chandra
e. Kepler
c
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What is the radius of the smallest Bohr orbit?
A) 2.14 × 10-9 m B) 1.12 × 10-9 m C) 1.56 × 10-11 m D) 3.17 × 10-11 m E) 5.29 × 10-11 m
The bathyscaphe Trieste consists of a thin-walled but very strong cylindrical hull, 15.2 m long and 3.66 m in diameter, filled with gasoline with a density of 880 kg/m3 to make it buoyant
If it is totally submerged in seawater with a density of 1025 kg/m3 and neither rising nor sinking, what is the weight of the Trieste craft? A) 127 kN B) 227 kN C) 327 kN D) 427 kN E) 527 kN
If we increased the pressure in the gas of a blackbody, how will the spectral lines be affected?
What will be an ideal response?
Which process(es) lead(s) to the gradual evolution of life via natural selection?
A) Changes that organisms acquire during their lives are passed on to their offspring. B) Organisms tend to produce more offspring than the local environment can support. C) Individuals vary in many heritable traits, and some will be better able to compete for resources at the given time and place in which they live. D) A and B E) B and C F) A, B, and C