Which of the following applies to Europa?
A) It is the most volcanically active body in the solar system.
B) It is thought to have a deep, subsurface ocean of liquid water.
C) It is the only moon in our solar system with an atmosphere thicker than Earth's atmosphere.
D) It is the largest moon in the solar system.
E) It is probably a captured Kuiper belt object.
B) It is thought to have a deep, subsurface ocean of liquid water.
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Water with a density of 1,000 
flows through a 2.00 cm diameter pipe with a velocity of 2.40 m/s. What is the volume flow rate?
A. 
B. 
C. 
D. 
E. 
A 4.00 kg ball is moving at 4.00 m/s to the EAST and a 6.00 kg ball is moving at 3.00 m/s to the NORTH. The total momentum of the system is
A. 14.2 kg m/s at an angle of 48.4 degrees SOUTH of EAST. B. 48.2 kg m/s at an angle of 24.2 degrees SOUTH of EAST. C. 48.2 kg m/s at an angle of 48.4 degrees NORTH of EAST. D. 24.1 kg m/s at an angle of 24.2 degrees SOUTH of EAST. E. 24.1 kg m/s at an angles of 48.4 degrees NORTH of EAST.
Which of the following is true about low-mass stars compared to high-mass stars?
A) Low-mass stars are cooler and less luminous than high-mass stars. B) Low-mass stars are hotter and more luminous than high-mass stars. C) Low-mass stars are cooler but more luminous than high-mass stars. D) Low-mass stars are hotter but less luminous than high-mass stars. E) Low-mass stars have the same temperature and luminosity as high-mass stars.
A magnifying glass produces an angular magnification of 7. What is the focal length of this lens if a person whose near point is 28 cm reads a book using this magnifying glass?
A) 2 cm B) 3 cm C) 4 cm D) 5 cm E) 6 cm