To determine the orbital period of a visual binary, we must measure
a. brightness.
b. position on the sky.
c. wavelengths.
d. luminosity.
e. temperature.
B
You might also like to view...
From Kepler's third law, an asteroid with an orbital period of 8 years lies at an average distance from the Sun equal to
A) 16 astronomical units. B) 4 astronomical units. C) 8 astronomical units. D) 2 astronomical units. E) It depends on the asteroid's mass.
An instrument is thrown upward with a speed of 15 m/s on the surface of planet X where the acceleration due to gravity is 2.5 m/s2 and there is no atmosphere. How long does it take for the instrument to return to where it was thrown?
A) 12 s B) 6.0 s C) 10 s D) 8.0 s
Cart A with momentum p (in magnitude) collides with cart B at rest and rebounds. What can you say about the momentum of cart B after the collision?
How does the force of friction for a sliding object vary with speed?
a. The force of friction is inversely proportional to speed. b. The force of friction is approximately independent of speed. c. The force of friction is proportional to speed. d. The force of friction is zero for a sliding object.