Annie Jump Cannon became famous for
A) developing our modern system for classifying stars.
B) discovering the planet Uranus.
C) discovering the planet Neptune.
D) building the world's largest telescope.
A) developing our modern system for classifying stars.
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The total mass of a binary system can be calculated from
a. the ratio of the angular separation from the center of mass of each of the stars. b. the distance to the binary and its radial velocity. c. the semi major axis and period of the orbit. d. the radial velocities of the two stars. e. the time required for the small star to eclipse the larger star.
Helium is more abundant on Saturn than on Jupiter
Indicate whether the statement is true or false
A steel hanger with solid cross section has horizontal force P 5 5.5 kN applied at free end D. Dimension variable b 5 175 mm and allowable normal stress is 150 MPa. Neglect self-weight of the hanger. The required diameter of the hanger is approximately:
(A) 5 cm
(B) 7 cm
(C) 10 cm
(D) 13 cm
Express an angle of 35.20 rad in degrees
What will be an ideal response?