The total mass of the pair of stars in spectroscopic binaries are difficult to estimate because
a. we can't measure the radial velocities of each star in the system.
b. we can't see the shape or tilt of the orbit.
c. we can't find the diameters of the stars.
d. we can't determine the luminosities of the stars.
e. the Doppler shift is not measurable.
Question 2
The optical shape of segmented mirrors is controlled by computer-driven thrusters under the mirrors in what is called
a. an achromatic lens.
b. active optics.
c. a Schmidt-Cassegrain design.
d. a Newtonian design.
e. interferometry.
Brain mass as a function of body mass in mammals.
A woman in a net on a Congo shore. Although the importation of slaves was illegal after 1807, histor
Total allowable and actual catch, Grand Bank Atlantic Cod 1959 -2012
Mass Wasting Triggers
He element M forms the chloride MCl4 containing 75.0% Cl by mass. What is the atomic weight of ...
What is the total resistance of the circuit in Figure 1? 150