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.
A pair of humpback whales lunge feeding through a bait ball
Mass Wasting Forms
What is the mass of air in a room that measures 5.0 m 8.0 m 3.0 m? (The density of air is ...
After elections were held, it was desired to estimate the proportion of voters who regretted ...
A company purchased 26 desks for $240 each and 18 chairs for $59 each. Compute the total ...