The force of gravity from one object extends to infinity never going to zero. When we say that gravitation is universal we mean that
a. the Earth exerts gravitational force on objects on its surface.
b. the Earth exerts a gravitational force on its Moon and vice versa.
c. the Earth, Moon, and Sun exert gravitational forces on each other.
d. all material objects in the universe exert gravitational forces on one another.
d
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A disk, a hoop, and a solid sphere are released at the same time at the top of an inclined plane. They are all uniform and roll without slipping. In what order do they reach the bottom?
A) sphere, hoop, disk B) hoop, disk, sphere C) sphere, disk, hoop D) hoop, sphere, disk E) disk, hoop, sphere
The layers of an undisturbed and well developed soil profile from top to bottom would be?
What will be an ideal response?
We have sent several spacecraft on trajectories that will ultimately take them into interstellar space (Pioneer 10 and 11, Voyager 1 and 2, New Horizons). How long will it take these spacecraft to travel as far as the nearest stars?
A) a few hundred years B) tens of thousands of years C) a few decades D) about a thousand years E) never, because they will rust and fall apart
Evaporation and precipitation are greatest over the
A) polar ice caps. B) continents. C) oceans. D) equator.