Which of the following telescopes is best suited for studying the hottest intergalactic gas (10 million K) in a cluster of galaxies?
A) Very Large Array Radio Telescope
B) Chandra X-ray Telescope
C) Herschel Infrared Telescope
D) Hubble Space Telescope (UV and optical and some infrared)
B
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The more mass a white dwarf has, the larger it is.
Answer the following statement true (T) or false (F)
A careful photographic survey of Jupiter's moon Io by the spacecraft Voyager 1 showed active volcanoes spewing liquid sulfur to heights of 70 km above the surface of this moon. If the value of g on Io is 2.0 m/s2, estimate the speed with which the liquid sulfur left the volcano
a. 260 m/s b. 530 m/s c. 790 m/s d. 970 m/s
A starship is constructed to be 100 m long in the factory. It is launched and as it coasts by Earth, it is measured to be shortened to 5.48 m long
(a) How fast, in terms of the speed of light, is it moving past Earth? (b) What length does the ship's crew measure for the ship?
The ground state electronic configuration for sodium is 1s22s22p63s1 . What is the orbital quantum number of the last (3s1) electron?
a. 3 c. 2 b. 1 d. 0