The moons of Mars, Phobos (Fear) and Deimos (Terror), are very close to the planet compared to Earth's Moon. Their orbital radii are 9,378 km and 23,459 km respectively. What is the ratio of the orbital speed of Phobos to that of Deimos?
A) 0.2528
B) 0.3998
C) 1.582
D) 2.858
E) 3.956
Answer: C
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If you could manage to stand on the Sun, you would weigh approximately ________ times more than your weight on Earth.
A. 100 B. 10 C. 30 D. 300,000
Most of the energy produced in the Sun is released in the form of visible light from the photosphere. However, some energy is released from the upper layers of the solar atmosphere
Which of the following best describes where other forms of light are released? A) The chromosphere is the source of ultraviolet light, and the corona is the source of X-rays. B) The chromosphere is the source of infrared light, and the corona is the source of ultraviolet light. C) The chromosphere is the source of X-rays, and the corona is the source of radio waves. D) The convection zone is the source of ultraviolet light, and the upper photosphere is the source of X-rays. E) Radio waves can pass directly through the gas which allows us to see the core.
A 5.00-kg box slides 3.00 m across the floor before coming to rest. What is the coefficient of kinetic friction between the floor and the box if the box had an initial speed of 3.00 m/s?
A) 1.50 B) 0.587 C) 0.153 D) 0.306 E) 0.200
Polymers, such as epoxy, with cross-links are _____________polymers that do not soften when heated.
Fill in the blank(s) with the appropriate word(s).