What is a meteorite?
A) a streak of light caused by a star moving across the sky
B) a comet that burns up in Earth's atmosphere
C) a streak of light caused by a small particle from space burning up in Earth's atmosphere
D) a fragment of an asteroid from the solar system that has fallen to Earth's surface
E) a small moon that orbits one of the giant planets
D
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A recurring nova might eventually build up enough mass to become a Type ________ supernova
Fill in the blank(s) with correct word
If the electric field and magnetic field of an electromagnetic wave are given by E = E0 sin(kx - ?t) and B = B0 sin(kx - ?t), and if the value of E0 is 51 µV/m, what is the value of B0? (c = 3.0 × 108 m/s)
A) 1.7 × 1014 T B) 1.7 × 103 T C) 1.7 × 10-14 T D) 1.7 × 104 T E) 1.7 × 10-13 T
An airplane is flying through a thundercloud at a height of 2 500 m. (This is a very dangerous thing to do because of updrafts, turbulence, and the possibility of electric discharge.) If there is a charge concentration of +42 C at height 4 000 m within the cloud and ?42 C at height 500 m, what is the magnitude of the electric field E at the aircraft? (ke = 8.99 × 10^9 N·m2/C2)
a. 9.4E+4 N/C b. 1.7E+5 N/C c. 6.2E+4 N/C d. 2.6E+5 N/C e. 1.9E+5 N/C
Which two circuits are exactly equivalent?
a.
A and B
b.
B and C
c.
C and D
d.
D and E
e.
B and E