The Kepler mission has been able to measure dimmings of less than 0.01% in a star's brightness. This has allowed us to detect what size planets?
A) planets smaller than Earth
B) planets Earth-size only
C) only planets larger than Earth
D) any size planet, as long as they are in binary star systems
A
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If only one color is absorbed in the pigment of a particular blue paint, that color would be
A) red. B) yellow. C) green. D) blue.
When the northern hemisphere is experiencing winter
What will be an ideal response?
If the communication lifetime of civilizations in our galaxy is 10,000 years and our galaxy is 13 billion years old, what is the chance of us detecting another intelligent civilization now?
A) 1 in 13,000 B) 1 in 1,300,000 C) 1 in 1300 D) 1 in 130,000
The determination of the composition of a material by bombarding it with neutrons and monitoring the emitted radiation is
a. nuclear fission analysis. b. nuclear fusion analysis. c. neutron activation analysis. d. nuclear emission analysis. e. beta decay analysis.