The Local Group
A. contains about 30 member galaxies.
B. has the Milky Way as its center.
C. is a supercluster.
D. is the globular cluster to which the Milky Way belongs.
E. None of these choices is correct.
Answer: A
You might also like to view...
When an object floats in a liquid, the buoyant force is __________ the weight of the liquid displaced by the object
Fill in the blank(s) with correct word
The acceleration due to gravity is smaller on Mars than the Earth, so the Mars rovers that explore the surface are lighter on Mars than they are on Earth. If the rovers roll across a flat plain, then the force required to accelerate the rovers is
A. more than would be required on Earth. B. less than would be required on Earth. C. the same as would be required on Earth.
Friction: A horizontal 52-N force is needed to slide a 50-kg box across a flat surface at a constant velocity of 3.5 m/s. What is the coefficient of kinetic friction between the box and the floor?
A. 0.11 B. 0.09 C. 0.10 D. 0.13
Which of the following is not an advantage of spacecraft flybys over ground-based telescope observations?
A) Spacecraft can sample the gravitational field of a planet. B) Spacecraft can view "backlit" views of planetary rings. C) Spacecraft can measure local magnetic fields. D) Spacecraft can monitor changes in a planet's atmosphere over long times. E) Spacecraft can make highly detailed images of the planet and its moons.