If we know an object is moving at constant velocity, we may assume:
a. the net force acting on the object is zero.
c. the object is accelerating.
b. there are no forces acting on the object.
d. the object is losing mass.
A
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Gaps in the asteroid belt (often called Kirkwood gaps) are caused by
A) tidal forces from the Sun. B) tidal forces from Jupiter. C) the competing gravitational tugs of Mars and Jupiter. D) orbital resonances with Jupiter.
What would be the next step in the scientific process for the Copernican heliocentric model?
In 1500s, Copernicus reintroduced the heliocentric model that the ancient Greeks had rejected, and it began to gain favor among some scientists. He suggested that the planets all orbit around the Sun in perfect circles, as shown in the figure to the right. This offers a much more elegant explanation of retrograde planetary motion than the geocentric model.
Where jets run into surrounding gas in the intergalactic medium, ____________ are formed before feeding the lobes
Fill in the blank(s) with correct word
When an object is in translational equilibrium, the net force acting on the object is non-zero
Indicate whether the statement is true or false