What other recent hypotheses would corroborate the hypothesis that life on Earth originated in space? (Choose all that apply.)
A) amino acids forming DNA
B) meteorites containing amino acids
C) cometary impacts as the source of water on Earth
D) early aerobic organisms created the oxygen in Earth's atmosphere
E) the fossil record showing how biological organisms on Earth have changed over time
B
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Phil leans over the edge of a cliff and throws a rock upward at 5 m/s. Neglecting air resistance, one second later the rock's speed is
A) zero. B) 5 m/s. C) 10 m/s. D) 15 m/s. E) none of the above
Estimate the distance (in cm) between the central bright region and the third dark fringe on a screen 5.00 m from two double slits 0.500 mm apart illuminated by 500-nm light
a. 3.47 b. 2.15 c. 1.75 d. 1.50 e. 1.25
Time Dilation: A spaceship with a constant speed of 0.800c relative to Earth travels to a star that is 4.30 light-years from Earth. How much time for this trip would elapse on a clock on Earth?
A. 3.23 y B. 4.40 y C. 5.15 y D. 5.38 y
Two moles of nitrogen gas are contained in an enclosed cylinder with a movable piston. If the gas temperature is 250 K, and the pressure is 1.10 × 10^6 N/m2, what is the volume? (R = 8.31 J/mol/K)
a. 1.89 × 10^?3 m3 b. 3.78 × 10^?3 m3 c. 4.72 × 10^?3 m3 d. 7.55 × 10^?3 m3 e. 2.83 × 10^?3 m3