Which of the following statements best describes the idea behind the Labeled Release Experiment on board the Viking landers?
A) living organisms in the soil should give off gases when they metabolize nutrients
B) soil with living organisms in it should contain organic molecules
C) living organisms in the soil should incorporate carbon from atmospheric gases
D) radioactive gases should be produced when radioactive nutrients are added to a soil sample
D
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Small deviations in a planet's orbital motion:
A) show we don't fully understand gravitational forces yet. B) indicate the presence of an extensive atmosphere. C) indicate the presence of a powerful magnetic field. D) imply the nearby presence of a massive body. E) show the planet's orbit isn't stable.
A 150-W lamp is placed into a 120-V ac outlet. What is the peak current?
A) 0.80 A B) 0.88 A C) 1.2 A D) 1.8 A
The Milky Way Galaxy is a part of a galaxy cluster known as _____
A) the Virgo Cluster B) the Local Group C) the M 81 Group D) the Bullet Cluster
Explain the significance of the center of gravity
What will be an ideal response?