Which of the following statements about Titan is not true?
A) It is the coldest moon in the solar system.
B) It may have an ocean of liquid ethane.
C) Its surface is hidden from view by its thick atmosphere.
D) Its temperature is too cold for liquid water to exist.
E) Its atmosphere is mostly nitrogen.
A
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Density is calculated as
A. mass times volume. B. volume divided by mass. C. mass divided by volume. D. mass times gravity.
Water is one of the most common substances in the universe, and vital to us on Earth. What happened to it on Mars?
What will be an ideal response?
Imagine a magnetic field pointing into the plane of this page. An electron moves across the paper from left to right. The direction of the magnetic force on the electron will be
A. out of the plane of the paper. B. in the plane of the paper and toward the bottom of the page. C. into the plane of the paper. D. in the plane of the paper and toward the top of the page. E. in the plane of the paper and opposite the electron's velocity.
Two converging lenses, the first with focal length 10.0 cm and the second with focal length 20.0 cm, are separated by 40.0 cm. An object, 3.00 cm in height, is placed 30.0 cm in front of the first lens. Where is the final image formed?
A. 11.1 cm after the second lens B. 100 cm after the second lens C. 45.0 cm after the second lens D. 5.00 cm after the second lens E. 5.00 cm before the second lens