Loops of glowing hydrogen seen hanging over the solar limb during totality are
A) solar rainbows.
B) haloes.
C) prominences.
D) filaments.
E) flares.
C
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Norma releases a bowling ball from rest; it rolls down a ramp with constant acceleration. After half a second it has traveled 0.40 m. How far has it traveled after two seconds?
a. 3.2 m c. 9.0 m b. 6.4 m d. 16 m
A simply supported beam (L 5 4.5 m) with rectangular cross section (b 5 95 mm, h 5 280 mm) supports uniform load q 5 25 kN/m. The ratio of the magnitudes of the principal stresses (?1/?2) at a point a 5 1.0 m from the left support and distance d 5 100 mm up from the bottom of the beam is approximately:
(A) 9
(B) 17
(C) 31
(D) 41
What is the average power if the current is Io sin(?t) and the voltage is Vo sin(?t)?
What will be an ideal response?
In a hypernova, a very energetic supernova creates a
A) set of planets to orbit their neutron star host. B) black hole. C) millisecond pulsar. D) very visible supernova remnant. E) white dwarf and its planetary nebula.