The rings of Uranus were discovered ____________
a. during an occultation of a star by the rings (as well as by the planet).
b. during an eclipse of one of the moons by the rings.
c. during a voyage to Uranus by astronauts
d. as Uranus and the rings passed behind Jupiter.
e. during an encounter by the Voyager 1 space probe.
a
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Dye penetrant is an effective method to detect _________cracks.
Fill in the blank(s) with the appropriate word(s).
A horizontal plank (m = 2.0 kg, L = 1.0 m) is pivoted at one end. A spring (k = 1.0 × 103 N/m) is attached at the other end, as shown in the figure. Find the angular frequency (in rad/s) for small oscillations
?
?
a.
39
b.
44
c.
55
d.
66
e.
25
What can we learn from the detailed shapes of craters?
What will be an ideal response?
Neon atoms in a glass tube can be excited
A) once per atom. B) repeatedly. C) by infrared light.